Delayed-release softgel capsules

Abstract

A delayed-release softgel capsule comprising a fill material and a pH-dependent shell composition. In one embodiment, the pH-dependent shell composition comprises gelatin, pectin, dextrose, and about 0.5 wt% to about 10 wt% of a synthetic polymer. In an alternative embodiment, the pH-dependent shell composition comprises gelatin, pectin, dextrose, and an organic acid. The delayed-release properties of the capsule inhibit premature release of the fill material at acidic pHs (e.g., any pH between about 1.2 and about 6).

Description

Technical Field

[0001] Cross - reference to Related Applications This application claims priority to U.S. Provisional Application No. 63 / 112,453, filed on November 11, 2020, the content of which is incorporated herein by reference in its entirety.

[0002] The present invention relates to delayed - release soft - gel capsules. In certain embodiments, the gelatin - based shell composition has delayed - release properties by including a small amount of a synthetic polymer, an organic acid, or a combination thereof.

Background Art

[0003] Soft capsules, particularly soft gelatin capsules (or soft - gel capsules), provide a dosage form that is more readily acceptable to patients because they are easy to swallow and do not require flavoring to mask any unpleasant taste of the active agent. Encapsulation of drugs in soft - gels further offers the potential to improve the bioavailability of pharmaceutical products. For example, the active ingredient can be rapidly released in liquid form as soon as the gelatin shell breaks.

[0004] Efforts have been made to create delayed - release dosage forms. Delayed - release dosage forms are designed to protect the contents of the dosage form from gastric conditions. For example, a delayed - release dosage form can be produced by adding a pH - dependent coating to the surface of a manufactured dosage form such as a tablet or a capsule. Such a coating can be applied by spraying it onto the dosage form and then drying the dosage form, usually at an elevated temperature. This method of coating capsules with a pH - dependent coating can result in drawbacks related to performance and appearance. For example, the capsules may look rough, the coating may be applied unevenly, and / or the coating may be prone to cracking or peeling off the dosage form. In addition, the process of applying a pH - dependent coating is very inefficient.

[0005] Other delayed-release dosage forms have been developed in which conventional pH-dependent polymers (i.e., acid-insoluble polymers) are added to the capsule shell. However, the addition of conventional pH-dependent polymers can result in capsules that are prone to leakage due to insufficient sealing, or that are fragile (i.e., eggshell-like) due to the large amount of polymer contained.

[0006] Improving the pH-dependent shell composition of softgel capsules is an ongoing effort. [Overview of the Initiative]

[0007] The present invention relates to delayed-release softgel capsules. The delayed-release softgel capsule comprises (a) a filler material and (2) a pH-dependent shell composition. The delayed-release softgel capsule according to the present invention does not require a pH-dependent coating. By eliminating the need to add a pH-dependent coating to the softgel capsule, the risk of damaging the capsule during the coating process is also minimized.

[0008] In certain embodiments, the pH-dependent shell composition comprises (a) gelatin, (b) dextrose, (c) pectin such as low-methoxyl pectin, and (d) a synthetic polymer in an amount of about 0.5 wt% to about 10 wt% relative to the total weight of the dry pH-dependent shell composition.

[0009] In certain embodiments, the pH-dependent shell composition comprises (a) a film-forming agent and (b) a synthetic polymer in an amount of about 0.5 wt% to about 10 wt% relative to the total weight of the dry pH-dependent shell composition.

[0010] In certain embodiments, the pH-dependent shell composition comprises (a) gelatin, (b) dextrose, (c) pectin such as low-methoxyl pectin, and (d) an organic acid.

[0011] In certain embodiments, the pH-dependent shell composition comprises (a) a film-forming agent and (b) an organic acid.

[0012] This disclosure also covers the processes for producing any of the delayed-release softgel capsules described herein.

[0013] In certain embodiments, the disclosure also covers a method of treating a condition by administering one of the delayed-release softgel compositions described herein to a subject requiring it.

[0014] The softgel capsules described herein, the pH-dependent shell compositions described herein, and their preparation processes (e.g., the presence or absence of a curing step and its conditions, organic acid washing, etc.) may be adjusted / modified / converted to achieve a target pH dissolution / disintegration profile (e.g., rupture / dissolution / disintegration time in acidic and buffered media) of the shell composition in various pH environments.

[0015] In certain embodiments, the disclosure relates to a method for inhibiting the early release of filler material (and correspondingly, activators present in the filler material) in the early gastrointestinal tract.

[0016] In certain embodiments, the disclosure relates to a method for inhibiting belching caused by the premature release of filler material (and correspondingly, activators present in the filler material) in the early gastrointestinal tract. [Modes for carrying out the invention]

[0017] The present invention advances the existing art by developing a delayed-release oral dosage form, particularly a delayed-release softgel capsule, that achieves the advantages associated with conventional delayed-release dosage forms without requiring the application of a pH-dependent coating. The delayed-release softgel capsule of the present invention does not dissolve / disintegrate in the gastric environment of the stomach, but rather dissolves at a target pH, for example, above about 1.2, above about 2, above about 3, above about 3.5, above about 4, above about 5, above about 6, or above about 6.8. The dissolution profile of the delayed-release softgel capsule described herein can be adjusted by modifying the shell composition of the softgel capsule.

[0018] Such mechanisms are beneficial for the delivery of active ingredients that may cause stomach irritation or are sensitive to the acidic environment of the stomach. Such mechanisms are also beneficial in reducing belching after ingesting capsules containing filling materials that tend to contribute to belching. For example, belching often occurs when ingesting vitamins, minerals, supplements, and / or pharmaceutical products formulated in dosage forms that exhibit some leakage (even very small amounts) in the stomach before reaching the intestines. Leakage can be particularly problematic when belching is associated with substances that have an unpleasant odor, such as fish oil and garlic, which are commonly delivered in softgels. The delayed-release softgel capsules described herein may be formulated in a manner that minimizes and / or eliminates premature leakage (and consequently, premature release of the capsule's filling) in the gastric environment of the stomach.

[0019] definition As used herein, the term “pH-dependent” is used to refer to the dissolution or disintegration resistance of a substance such that no or substantially no dissolution or disintegration occurs in the gastric environment of the stomach for a period of time, for example, at least about 15 minutes, at least about 30 minutes, at least about 1 hour, at least about 2 hours, at least about 3 hours, at least about 4 hours, or at least about 5 hours. In certain embodiments, the gastric environment of the stomach may be simulated here by 0.1N HCl adjusted to pH 1.2, 2, 3, 4, 5, or 6 with a buffer such as phosphate buffer solution, sodium hydroxide solution, or potassium hydroxide solution, and optionally by the addition of pepsin. It should be noted that while pharmacopoeial methods do not include pepsin, pepsin was added in certain dissolution / disintegration tests described herein to better simulate / mimic in vivo conditions. Thus, without being construed as limiting, in certain embodiments, the compositions described herein are resistant to dissolution / disintegration for the above times even in a 0.1N HCl environment containing pepsin (which is presumed to be a more aggressive environment than 0.1N HCl without pepsin).

[0020] For example, embodiments described herein include pH-dependent shell compositions that preferentially dissolve at pH 3.5 or higher, 4 or higher, 5 or higher, or 6 or higher (e.g., in a biological, artificial, or simulated duodenal environment and / or intestinal fluid) compared to biological, artificial, or simulated gastric juice. In certain embodiments, the intestinal environment may be simulated here with a pH 6.8 phosphate buffer containing or without pancreatin. For example, the pH-dependent shell compositions described herein dissolve in less than 60 minutes, less than 45 minutes, less than 30 minutes, less than 20 minutes, less than 10 minutes, or less than 5 minutes at pH 3.5 or higher, 4 or higher, 5 or higher, or 6 or higher (e.g., in a biological, artificial, or simulated duodenal environment and / or intestinal fluid, such as a pH 6.8 phosphate buffer containing pancreatin as needed). It should be noted that while the pharmacopoeial methods do not contain pancreatin, pancreatin was added in certain dissolution / disintegration tests described herein to better simulate / mimic in vivo conditions. Therefore, without being construed as limiting, in certain embodiments, the compositions described herein exhibit similar dissolution / disintegration profiles in buffered environments at pH approximately 3.5 or higher, 4 or higher, 5 or higher, 6 or higher, or 6.8 containing pancreatin (presumably more aggressive environments than a pH 6.8 buffered environment without pancreatin).

[0021] As used herein, “pharmaceutically active ingredient” and “activator” refer to drugs or compounds that may be used in the diagnosis, treatment, relief, management, or prevention of a condition. In certain embodiments, a suitable “activator” includes nutritional supplements such as vitamins, minerals, and supplements (VMS). Exemplary delayed-release softgel capsules may include, without limitation, capsules containing lactic acid bacteria, probiotics, fish oil capsules, valproic acid, garlic, peppermint oil, polyethylene glycol, ibuprofen solution or suspension, proton pump inhibitors, aspirin, and similar products.

[0022] The terms "condition" or "conditions" refer to those medical conditions that can be treated or prevented by administration of an effective amount of an active agent to a subject.

[0023] As used herein, the term "active ingredient" refers to any substance that is intended to bring about a therapeutic, prophylactic, or other intended effect, whether or not approved by a government agency for that purpose. This term with respect to a particular agent includes the pharmaceutically active agent, as well as all of its pharmaceutically acceptable salts, solvates and crystalline forms, which are pharmaceutically active.

[0024] Any pharmaceutically active ingredient, including both those that are water-soluble and those that are water-insoluble, can be used for the purposes of the present invention. Suitable pharmaceutically active ingredients include, without limitation, analgesics and anti-inflammatory agents (e.g., ibuprofen, naproxen sodium, aspirin), antacids, anthelmintics, antiarrhythmics, antibacterial agents, anticoagulants, antidepressants, antidiabetic agents, antidiarrheals, antiepileptics, antifungal agents, antigout agents, antihypertensives, antimalarials, antimigraine agents, antimuscarinics, antineoplastic agents and immunosuppressants, antiprotozoals, antirheumatics, antithyroid agents, antivirals, anxiolytics, sedatives, hypnotics and anxiolytics, beta blockers, cardiotonics, corticosteroids, antitussives, cytotoxics, decongestants, diuretics, enzymes, antiparkinson agents, gastrointestinal agents, histamine receptor antagonists, lipid regulators, local anesthetics, neuromuscular agents, nitrates and antianginals, nutrients, opioid analgesics, anticonvulsants (e.g., valproic acid), oral vaccines, proteins, peptides and recombinant drugs, sex hormones and contraceptives, spermicides, stimulants, and combinations thereof.

[0025] In some embodiments, the active pharmaceutical ingredient may be selected without limitation from the group consisting of dabigatran, doronedarone, ticagrelor, iloperidone, ibakhtol, midostaurin, acimadrine, beclomethasone, apremilast, sapacitabine, lincitinib, abiraterone, vitamin D analogues (e.g., calcifediol, calcitriol, paricalcitol, doxelcalciferol), COX-2 inhibitors (e.g., celecoxib, valdecoxib, rofecoxib), tacrolimus, testosterone, lubiprostone, pharmaceutically acceptable salts thereof, and combinations thereof.

[0026] In some embodiments, the lipids in the dosage form may be selected without limitation from the group consisting of almond oil, argan oil, avocado oil, borage seed oil, canola oil, cashew oil, castor oil, hydrogenated castor oil, cocoa butter, coconut oil, rapeseed oil, corn oil, cottonseed oil, grape seed oil, hazelnut oil, hemp oil, hydroxylated lecithin, lecithin, linseed oil, macadamia oil, mango butter, Manila oil, mongongo nut oil, olive oil, palm kernel oil, palm oil, peanut oil, pecan oil, perilla oil, pine nut oil, pistachio oil, poppy seed oil, pumpkin seed oil, peppermint oil, rice bran oil, safflower oil, sesame oil, shea butter, soybean oil, sunflower oil, hydrogenated vegetable oil, walnut oil, and watermelon seed oil. Other oils and fats may include, but are not limited to, fish oil (omega-3), krill oil, animal or vegetable fats such as their hydrogenated forms, free fatty acids, and monoglycerides, diglycerides, and triglycerides containing C8-, C10-, C12-, C14-, C16-, C18-, C20-, and C22- fatty acids, fatty acid esters such as EPA and DHA3, and combinations thereof.

[0027] According to certain embodiments, the active agent may include, but is not limited to, lipid-lowering agents such as statins (e.g., lovastatin, simvastatin, pravastatin, fluvastatin, atorvastatin, rosuvastatin, and pitavastatin), fibrates (e.g., clofibrate, ciprofibrate, bezafibrate, fenofibrate, and gemfibrozil), niacin, bile acid sequestrants, ezetimibe, lomitapide, phytosterols, and pharmaceutically acceptable salts, hydrates, solvates, and prodrugs thereof, mixtures of any of the foregoing, and the like.

[0028] Suitable nutraceutical active agents may include, but are not limited to, 5-hydroxytryptophan, acetyl L-carnitine, alpha lipoic acid, alpha-ketoglutaric acid, bee products, betaine hydrochloride, bovine cartilage, caffeine, cetyl myristoleate, charcoal, chitosan, choline, chondroitin sulfate, coenzyme Q10, collagen, colostrum, creatine, cyanocobalamin (vitamin B12), dimethylaminoethanol, fumaric acid, germanium sesquioxide, glandular products, glucosamine HCl, glucosamine sulfate, hydroxymethylbutyrate, immunoglobulins, lactic acid, L-carnitine, liver products, malic acid, maltose anhydride, mannose (d-mannose), methylsulfonylmethane, phytosterols, picolinic acid, pyruvic acid, red yeast extract, S-adenosylmethionine, selenium yeast, shark cartilage, theobromine, vanadyl sulfate, and yeast.

[0029] Suitable nutritional supplement active agents may include vitamins, minerals, fiber, fatty acids, amino acids, herbal supplements, or combinations thereof.

[0030] Suitable vitamin activators may include, but are not limited to, ascorbic acid (vitamin C), vitamin B, biotin, fat-soluble vitamins, folic acid, hydroxycitric acid, inositol, mineral ascorbates, mixed tocopherols, niacin (vitamin B3), orotic acid, para-aminobenzoic acid, pantothenate, pantothenic acid (vitamin B5), pyridoxine hydrochloride (vitamin B6), riboflavin (vitamin B2), synthetic vitamins, thiamine (vitamin B1), tocotrienols, vitamin A, vitamin D, vitamin E, vitamin F, vitamin K, vitamin oils, and fat-soluble vitamins.

[0031] Suitable herbal supplement activators may include, but are not limited to, arnica, bilberry, black cohosh, cat's claw, chamomile, echinacea, evening primrose oil, fenugreek, linseed, feverfew, garlic oil, ginger root, ginkgo biloba, Korean ginseng, goldenrod, hawthorn, birch, licorice, milk thistle, plantain, Indian jasmine, senna, soybean, St. John's wort, yarrow palmetto, turmeric, and valerian.

[0032] Mineral activators may include, but are not limited to, boron, calcium, chelated minerals, chlorides, chromium, coated minerals, cobalt, copper, dolomite, iodine, iron, magnesium, manganese, mineral premixes, mineral products, molybdenum, phosphorus, potassium, selenium, sodium, vanadium, malic acid, pyruvate, zinc, and other minerals.

[0033] Other possible activators include, but are not limited to, antihistamines (e.g., ranitidine, dimenhydrinate, diphenhydramine, chlorpheniramine, and dexchlorpheniramine maleate), nonsteroidal anti-inflammatory drugs (e.g., aspirin, celecoxib, Cox-2 inhibitors, diclofenac, benoxaprofen, flurbiprofen, fenoprofen, flubufen, indoprofen, pyroprofen, carprofen, oxaprozin, pramoprofen, muroprofen, trioxaprofen, spro Fen, aminoprofen, fluprofen, bucloxic acid, indomethacin, sulindac, zomepirac, thiopinac, didomethacin, acemetacin, fentiazac, clidanac, oxypinac, meclofenamic acid, flufenamic acid, diflumic acid, tolfenamic acid, diflurisal, fluphenisal, piroxicam, sudoxicam, isoxicam, aceclofenac, alloxypyrine, azapropazon, benolilate, bromfenac, carprofen, choline magnesium salicylate, diflunisal, etodolac, etoricoxib, faislamin (f aislamine, fenbufen, fenoprofen, flurbiprofen, ibuprofen, indomethacin, ketoprofen, ketorolac, lornoxicam, loxoprofen, meloxicam, mefenamic acid, metamizole, methyl salicylate, magnesium salicylate, nabumetone, naproxen, nimeslide, oxyfenbutazone, parecoxib, phenylbutazone, salicylate salicylate, sulindac, sulfinpyrazone, tenoxicam, tiaprofenic acid, tolmetine, their pharmaceutically acceptable salts and mixtures thereof) and This includes acetaminophen, antiemetics (e.g., metoclopramide, methylnaltrexone), antiepileptics (e.g., pheniloin, meprobmate, and nitrazepam), vasodilators (e.g., nifedipine, papaverine, diltiazem, and nicardipine), antitussives and expectorants (e.g., codeine phosphate), antiasthmatics (e.g., theophylline), antacids, antispasmodics (e.g., atropine, scopolamine), antidiabetic drugs (e.g., insulin), diuretics (e.g., ethacrine, bendrofluthiazide), antihypertensives (e.g., propranolol, clonidine),This includes antihypertensive drugs (e.g., clonidine, methyldopa), bronchodilators (e.g., albuterol), steroids (e.g., hydrocortisone, triamcinolone, prednisone), antibacterial agents (e.g., tetracycline), anti-hemorrhoids, hypnotics, psychotropic drugs, antidiarrheals, mucolytics, sedatives, decongestants (e.g., pseudoephedrine), laxatives, vitamins, stimulants (including appetite suppressants such as phenylpropanolamine), and cannabinoids, as well as their pharmaceutically acceptable salts, hydrates, solvates, and prodrugs.

[0034] The activator may be a benzodiazepine, barbiturate, stimulant, or a mixture thereof. The term “benzodiazepine” refers to drugs that are benzodiazepines and benzodiazepine derivatives that can depress the central nervous system. Benzodiazepines include, but are not limited to, alprazolam, bromazepam, chlordiazepoxide, clorazepic acid, diazepam, estazolam, flurazepam, harazepam, ketazolam, lorazepam, nitrazepam, oxazepam, prazepam, quazepam, temazepam, triazolam, and their pharmaceutically acceptable salts, hydrates, solvates, prodrugs, and mixtures. Benzodiazepine antagonists that may be used as activators include, but are not limited to, flumazenil and its pharmaceutically acceptable salts, hydrates, solvates, and mixtures.

[0035] The term "barbiturate" refers to sedatives and hypnotics derived from barbituric acid (2,4,6-trioxohexahydropyrimidine). Barbiturates include, but are not limited to, amobarbital, aprobarbital, butabarbital, butarbital, methhexital, mehobarbital, metalbital, pentobarbital, phenobarbital, secobarbital, and their pharmaceutically acceptable salts, hydrates, solvates, prodrugs, and mixtures. Barbiturate antagonists that can be used as activators include, but are not limited to, amphetamines and their pharmaceutically acceptable salts, hydrates, solvates, and mixtures.

[0036] The term “stimulant” includes, but is not limited to, amphetamines, e.g., dextroamphetamine resin complexes, dextroamphetamine, methamphetamine, methylphenidate, and their pharmaceutically acceptable salts, hydrates, solvates, and mixtures. Stimulant antagonists that can be used as activators include, but is not limited to, benzodiazepines, and their pharmaceutically acceptable salts, hydrates, solvates, and mixtures.

[0037] The dosage forms provided herein include a variety of activators and their pharmaceutically acceptable salts. These pharmaceutically acceptable salts include, but are not limited to, inorganic salts such as hydrochlorides, hydrobroms, sulfates, and phosphates; organic salts such as formates, acetates, trifluoroacetates, maleates, and tartrates; sulfonates such as methanesulfonates, benzenesulfonates, and p-toluenesulfonates; amino acid salts such as alginates, aspartates, and glutamates; and metal salts such as sodium salts, potassium salts, and cesium salts; alkaline earth metals such as calcium salts and magnesium salts; and organic amine salts such as triethylamine salts, pyridine salts, picolines, ethanolamine salts, triethanolamine salts, dicyclohexylamine salts, and N,N'-dibenzylethylenediamine salts.

[0038] As used herein, the terms “therapeutably effective” and “effective dose” refer to the amount or proportion of the active agent administered that is necessary to produce the desired therapeutic effect.

[0039] As used herein, “shell” or “shell composition” refers to the shell of a softgel capsule that encloses a filler material.

[0040] As used herein, “not containing or substantially not containing” means a composition containing less than about 1 wt%, less than about 0.5 wt%, less than about 0.25 wt%, less than about 0.1 wt%, less than about 0.05 wt%, less than about 0.01 wt%, or 0 wt% of the said component.

[0041] Throughout this specification and the claims, all references to wt% refer to the weight of the component relative to the total weight of the composition in question, and may also be expressed as w / w.

[0042] As used herein, “filling material” or “filling” refers to a composition encapsulated by a pH-dependent capsule shell and containing at least one pharmaceutically active ingredient.

[0043] As used herein, “delayed-release capsule,” “delayed-release softgel capsule,” “pH-dependent capsule,” or “pH-dependent softgel capsule” refers to a capsule in which a filler material is encapsulated in a shell and, once the capsule is dried, it exhibits delayed or pH-dependent properties. In certain embodiments, these terms may also refer to a capsule that has been cured after drying. In certain embodiments, no further processing steps are required after drying. In certain embodiments, no further processing steps are required after curing.

[0044] As used herein, “about” refers to any value within a ±10% variation, and therefore “about 10” includes 9 to 11. As used herein, “a,” “an,” or “the” refers to one or more unless otherwise specified. For example, a reference to “a single excipient” includes a single excipient and mixtures of two or more different excipients, etc.

[0045] Unless otherwise specifically indicated herein, the enumeration of value ranges herein is intended solely as a simplified method of referring individually to each separate value within the range, and each separate value is incorporated herein as if it were individually enumerated herein. Unless otherwise specifically indicated herein or clearly contradicted by the context, all methods described herein may be performed in any suitable order.

[0046] The use of any example or illustrative language provided herein (e.g., "etc.") is intended merely to illustrate certain materials and methods and does not impose any limitation on their scope. The language herein should not be construed as indicating that any non-claimed element is essential to the practice of the disclosed materials and methods.

[0047] Soft gel capsule dosage form According to the first embodiment, the pH-dependent softgel capsule comprises (a) a filling material and (b) a pH-dependent shell composition, wherein the filling material comprises at least one activator, and the pH-dependent shell composition comprises gelatin, dextrose, a pH-dependent material (e.g., low methoxyl pectin), a synthetic polymer, and optionally a plasticizer. Preferably, the synthetic polymer is present in the pH-dependent shell composition in an amount of about 0.5 wt% to about 10 wt% relative to the total weight of the dry pH-dependent shell composition.

[0048] According to a particular embodiment, the pH-dependent softgel capsule comprises (a) a filling material and (b) a pH-dependent shell composition, wherein the filling material comprises at least one activator, and the pH-dependent shell composition comprises a film-forming agent and a synthetic polymer. Preferably, the synthetic polymer is present in the pH-dependent shell composition in an amount of about 0.5 wt% to about 10 wt% based on the total weight of the dry pH-dependent shell composition. The pH-dependent shell composition may further comprise at least one of pectin, dextrose, or gelatin.

[0049] According to an alternative embodiment, the pH-dependent softgel capsule comprises (a) a filling material and (b) a pH-dependent shell composition, wherein the filling material comprises at least one activator, and the pH-dependent shell composition comprises gelatin, dextrose, a pH-dependent material (e.g., low methoxyl pectin), an organic acid, and optionally a plasticizer.

[0050] According to an alternative embodiment, the pH-dependent softgel capsule comprises (a) a filling material and (b) a pH-dependent shell composition, wherein the filling material comprises at least one activator, and the pH-dependent shell composition comprises a film-forming agent and an organic acid. The pH-dependent shell composition may further comprise at least one of pectin, dextrose, or gelatin.

[0051] According to a particular embodiment, a pH-dependent softgel capsule comprises (a) a filling material and (b) a pH-dependent shell composition, wherein the filling material comprises at least one pharmaceutically active ingredient, and the pH-dependent shell composition comprises gelatin, dextrose, a pH-dependent material (e.g., low methoxyl pectin), an organic acid, a synthetic polymer, and optionally a plasticizer. Preferably, the synthetic polymer is present in the pH-dependent shell composition in an amount of about 0.5 wt% to about 10 wt% relative to the total weight of the dry pH-dependent shell composition.

[0052] According to a particular embodiment, a pH-dependent softgel capsule comprises (a) a filling material and (b) a pH-dependent shell composition, wherein the filling material comprises at least one pharmaceutically active ingredient, and the pH-dependent shell composition comprises a film-forming agent, an organic acid, and a synthetic polymer. Preferably, the synthetic polymer is present in the pH-dependent shell composition in an amount of about 0.5 wt% to about 10 wt% based on the total weight of the dry pH-dependent shell composition. The pH-dependent shell composition may further comprise at least one of pectin, dextrose, or gelatin.

[0053] A suitable filler material comprises at least one pharmaceutically active ingredient and can be prepared according to known methods. In addition to at least one pharmaceutically active ingredient, a suitable filler material may include additional filler components, such as flavoring agents, sweeteners, colorants, and fillers or other pharmaceutically acceptable excipients or additives, such as synthetic dyes and mineral oxides. Appropriate amounts of pharmaceutically active ingredients and pharmaceutically acceptable excipients can be readily determined by those skilled in the art.

[0054] In one embodiment, the gelatin in the pH-dependent shell composition may include type A gelatin, type B gelatin, animal hide or skin gelatin (e.g., calf hide, pig hide) and / or bone gelatin (e.g., bovine bone, pig bone), used alone or in combination. In one embodiment, the gelatin is 250 bloom gelatin. In another embodiment, there is only one type of gelatin. In yet another embodiment, the gelatin is a combination of at least two types of gelatin. In one embodiment, the amount of gelatin in the pH-dependent shell composition is about 30 wt% to about 85 wt%, about 30 wt% to about 75 wt%, about 30 wt% to about 65 wt%, about 30 wt% to about 55 wt%, about 30 wt% to about 40 wt%, about 40 wt% to about 80 wt%, about 45 wt% to about 65 wt%, about 45 wt% to about 75 wt%, or about 50 wt% to about 70 wt%, or any single value or partial range thereof, based on the total weight of the dry capsule shell composition.

[0055] In certain embodiments, the pH-dependent shell composition may include a film-forming agent, which is a non-animal-derived gelling agent, instead of or in addition to at least one of gelatin, pectin, or dextrose. Suitable non-animal-derived gelling agents include, without limitation, carrageenan, starch, pregelatinized starch, xanthan gum, agar, pectin, alginates, sugars, high molecular weight polyethylene glycol, sugar-derived alcohols, cellulose derivatives, cellulose polymers, hydroxyethylcellulose, hydroxypropylcellulose, hydroxypropylmethylcellulose, carboxymethylcellulose, microcrystalline cellulose, attapulgite, bentonite, dextrin, alginates, kaolin, lecithin, aluminum magnesium silicate, carbomer, carbopole, silicon dioxide, curdlan, ferceleran, albumin, soy protein, chitosan, or combinations thereof.

[0056] Carrageenan may be at least one of iotacarrageenan, kappacarrageenan, and lambdacarrageenan.

[0057] Starch can be modified starch or natural starch, sweet potato starch, potato starch, corn starch, tapioca starch, pea starch, hydroxypropylated starch, hydroxyalkylated starch, acid-treated starch, dextrin, high-amylose unprocessed corn starch, processed waxy corn starch, non-granular starch, processed high-amylose corn starch, pregelatinized rice flour, and combinations thereof. As used herein and in the claims, the term “modified starch” includes starches such as hydroxypropylated starch and acid-diluted starch. Generally, modified starch is a product prepared by the chemical treatment of starch, such as acid-treated starch, enzyme-treated starch, oxidized starch, cross-linked starch, and other starch derivatives. Modified starch is preferably derivatized, in which case the side chains are modified with hydrophilic or hydrophobic groups, thereby forming a more complex structure with strong interactions between the side chains.

[0058] In certain embodiments, the non-animal gelling agent is present in the shell composition in amounts such as, for example, about 2 wt.% to about 20 wt.%, about 2 wt.% to about 15 wt.%, about 2 wt.% to about 40 wt.%, about 10 wt.% to about 80 wt.%, or about 15 wt.% to about 75 wt.%, or about 20 wt.% to about 70 wt.%, or about 25 wt.% to about 60 wt.%, or about 25 wt.% to about 45 wt.%, or about 20 wt.% to about 35 wt.%, or about 30 wt.% to about 40 wt.%, or about 32 wt.%, or about 35 wt.%, or about 38 wt.%, or any sub-range or single concentration value therein, where all wt.% are based on the total weight of the shell composition. In one embodiment, the non-animal gelling agent includes carrageenan and does not contain starch (or modified starch). In one embodiment, the soft gel shell composition is substantially starch-free or starch-free.

[0059] In one embodiment, the pH-dependent capsule shell composition contains dextrose. In one embodiment, the amount of dextrose in the pH-dependent capsule shell composition is about 0.001 wt% to about 1.0 wt%, about 0.002 wt% to about 0.008 wt%, about 0.005 wt%, or about 0.01 wt% to about 4 wt%, about 0.1 wt%, or about 0.15 wt% to about 3 wt%, about 0.1 wt% to about 1 wt%, about 0.1, or about 0.15 wt%, or about 0.2 wt%, or about 0.25 wt% to about 2 wt%, about 0.1 wt% to about 0.2 wt%, about 0.1 wt% to about 0.4 wt%, or any single value or partial range thereof, based on the total weight of the dry capsule shell composition. Dextrose may be added to the delayed-release capsule shell to mitigate a potential decrease in gel strength. Without being interpreted as restrictive, dextrose is thought to interact with gelatin in the shell composition and crosslink the gelatin. The concentration of dextrose in the pH-dependent shell composition may be an effective amount to improve gel strength, but it does not need to be high enough to interfere with capsule sealing, manufacturability, or product performance.

[0060] In some embodiments, the pH-dependent shell composition may contain pectin, such as low-methoxyl pectin. In one embodiment, the pectin is low-methyl ester (LM) pectin having a degree of esterification less than 50. In some embodiments, the pectin is amidated pectin. In certain embodiments, the amidated pectin may have a degree of amidation lower than 25, 5–25, 10–20, or 15–25. In other embodiments, the low-methoxyl (LM) pectin is unamidated pectin. In certain embodiments, the pectin is a combination of amidated and unamidated pectin. The addition of pectin contributes to the pH dependence of the dosage form.

[0061] Excessive pectin in a dosage form can reduce the gel strength of a softgel capsule, which in turn can negatively affect its sealing ability. Excessive pectin in a pH-dependent shell composition can also increase the viscosity of the shell composition, making processing difficult or impossible from a manufacturing standpoint. Therefore, pectin can be added to a dosage form at a concentration high enough to form a delayed-release dosage form, while simultaneously mitigating the decrease in gel strength and the increase in viscosity.

[0062] In one embodiment, the amount of pectin in the pH-dependent shell composition is about 2 wt% to about 20 wt%, about 3 wt% to about 15 wt%, about 3 wt% to about 5.5 wt%, about 4 wt% to about 11 wt%, about 7 wt% to about 12 wt%, about 8 wt% to about 13 wt%, or about 5 wt% to about 10 wt%, or any single value or partial range thereof, relative to the total weight of the dry capsule shell composition.

[0063] The degree of esterification of pectin incorporated into the pH-dependent shell composition may be less than approximately 50%, or may be in the range of approximately 10% to approximately 50%, approximately 20% to approximately 40%, or approximately 25% to approximately 35%. Furthermore, the pectin may be amidated or unamidated.

[0064] In certain embodiments, the pH-dependent shell composition includes a stabilizer and / or binder, which may include gellan gum. In certain embodiments, the amount of the stabilizer and / or binder (e.g., gellan gum) in the pH-dependent shell composition is about 0.05 wt% to about 5 wt%, about 0.1 wt% to about 3 wt%, or about 0.2 wt% to about 2 wt%, or any single value or partial range thereof, based on the total weight of the dry capsule shell composition.

[0065] In a particular embodiment, the pH-dependent shell composition may have a viscosity ranging from approximately 20,000 cPs, approximately 30,000 cPs, approximately 40,000 cPs, approximately 50,000 cPs, approximately 60,000 cPs, or approximately 70,000 cPs to approximately 80,000 cPs, approximately 90,000 cPs, approximately 100,000 cPs, approximately 110,000 cPs, approximately 120,000 cPs, approximately 130,000 cPs, approximately 140,000 cPs, or approximately 150,000 cPs, or any sub-range or single value within that range. In one embodiment, the pH-dependent shell composition has a viscosity in the range of about 100,000 cPs to about 130,000 cPs, or about 110,000 cPs to about 125,000 cPs, or about 115,000 cPs, or about 120,000 cPs. Viscosity is measured using a rheometer at 60°C. A gel mass sample (e.g., of any of the pH-dependent shell compositions described herein) is placed on the sample stage of a rheometer maintained at 60°C. The disk is rotated at a specific speed to produce a constant shear rate. Viscosity is obtained by measuring the shear stress and shear rate.

[0066] In certain embodiments, the pH-dependent shell composition may maintain a manufacturability-suitable viscosity even after thermal aging for up to approximately 24 hours, up to approximately 48 hours, up to approximately 72 hours, up to approximately 96 hours, or up to approximately one week. In certain embodiments, the viscosity of the pH-dependent shell composition may decrease by up to approximately 80%, up to approximately 70%, up to approximately 60%, up to approximately 50%, up to approximately 40%, up to approximately 35%, or up to approximately 30% (from the viscosity value of the composition before aging) after thermal aging (up to approximately 24 hours, up to approximately 48 hours, up to approximately 72 hours, up to approximately 96 hours, or up to approximately one week).

[0067] In one embodiment, the plasticizer in the pH-dependent shell composition may include glycerin, sorbitol, or a sorbitol-sorbitan solution and combinations thereof. Other suitable plasticizers may include, but are not limited to, sugar alcohol plasticizers such as isomalt, maltitol, xylitol, erythritol, adonitol, dulcitol, pentaerythritol, or mannitol; or polyol plasticizers such as diglycerin, dipropylene glycol, polyethylene glycol up to 10,000 MW, neopentyl glycol, propylene glycol, 1,3-propanediol, 2-methyl-1,3-propanediol, trimethylolpropane, polyether polyol, ethanolamine; and mixtures thereof. Other exemplary plasticizers may also include, without limitation, low molecular weight polymers, oligomers, copolymers, oils, small organic molecules, low molecular weight polyols having aliphatic hydroxyls, ester plasticizers, glycol ethers, poly(propylene glycol), multiblock polymers, singleblock polymers, citrate ester plasticizers, and triacetin. Such plasticizers may include 1,2-butylene glycol, 2,3-butylene glycol, styrene glycol, monopropylene glycol monoisopropyl ether, propylene glycol monoethyl ether, ethylene glycol monoethyl ether, diethylene glycol monoethyl ether, sorbitol or sorbitol sorbitan solution, lactate, ethyl lactate, butyl lactate, ethyl glycolate, dibutyl sebacate, acetyl tributyl citrate, triethyl citrate, glyceryl monostearate, polysorbate 80, acetyl triethyl citrate, tributyl citrate and allyl glycolate, and mixtures thereof.

[0068] In one embodiment, the amount of plasticizer in the pH-dependent shell composition is about 15 wt% to about 45 wt%, about 15 wt% to about 40 wt%, about 18 wt% to about 45 wt%, about 18 wt% to about 42 wt%, about 20 wt% to about 35 wt%, about 25 wt% to about 30 wt%, or any single value or partial range thereof, based on the total weight of the dry capsule shell composition.

[0069] In certain embodiments, any of the pH-dependent shell compositions described herein may further comprise synthetic polymers. Suitable synthetic polymers include, but are not limited to, acrylic and methacrylic acid polymers available under the trademark EUDRAGIT®, methacrylic acid-ethyl acrylate copolymers available under the trademark Kollicoat®, and other conventional acid-insoluble polymers, such as methyl acrylate-methacrylic acid copolymers. Other suitable acid-insoluble polymers include, but are not limited to, cellulose succinate acetate, cellulose phthalate acetate, cellulose butyrate acetate, hydroxypropyl methylcellulose phthalate, hydroxypropyl methylcellulose acetate succinate (hypromellose acetate succinate), polyvinyl acetate phthalate (PVAP), alginates such as sodium alginate and potassium alginate, stearic acid, and shellac.

[0070] In certain embodiments, suitable synthetic polymers are water-insoluble, such as methacrylate-ethyl acrylate copolymers. Adding a water-insoluble polymer to a pH-dependent shell composition is thought to make the pH-dependent shell composition more hydrophobic. A more hydrophobic pH-dependent shell composition (compared to one without synthetic polymers) is thought to reduce the amount of water migrated from the filler into the shell composition. This, in turn, enhances the robustness of the shell composition, allowing it to maintain its mechanical strength. This is also thought to enable inhibition of premature release from the softgel capsule (containing the pH-dependent shell composition) without requiring prolonged curing (e.g., 4-5 days at approximately 40°C). This benefit can even be observed in softgel capsules where the pH-dependent shell composition contains non-amidated pectin. This benefit can also be observed in softgel capsules where the pH-dependent shell composition does not contain stabilizers / binders such as gellan gum. Methacrylate-ethyl acrylate copolymers (and other suitable acrylate polymers as recognized by those skilled in the art) combined with pectin may also extend the pH-dependent shell composition and, correspondingly, the pH performance of softgel capsules (for example, by extending the durability of softgel capsules at higher pH values ​​and enabling targeted release of the filling material to target sites within the gastrointestinal tract).

[0071] In one embodiment, the synthetic polymer is Kollicoat MAE-100P, which is a methacrylate-ethyl acrylate copolymer (1:1). This synthetic polymer may be selected because, in certain embodiments, it is already pre-neutralized and does not require the addition of a base (e.g., ammonia) to neutralize or solubilize the polymer during processing.

[0072] In certain embodiments, the amount of synthetic polymer in the pH-dependent shell composition described herein is about 0.5 wt% to about 10 wt%, about 1 wt% to about 5 wt%, about 1.5 wt% to about 4 wt%, or about 2 wt% to about 3 wt%, or any single value or partial range thereof, based on the total weight of the dry capsule shell composition.

[0073] Synthetic polymers are considered, without being interpreted as limiting, to function as sealants to stop / inhibit the leakage of filling material from the capsule closure.

[0074] In certain embodiments, any of the pH-dependent shell compositions described herein may further contain an organic acid. Suitable organic acids include lactic acid, tannic acid, citric acid, acetic acid, or a combination thereof. In one embodiment, the organic acid in the pH-dependent shell composition is lactic acid. In one embodiment, the organic acid in the pH-dependent shell composition is tannic acid. In one embodiment, the organic acids in the pH-dependent shell composition are lactic acid and tannic acid.

[0075] In certain embodiments, the amount of organic acid in the pH-dependent shell composition described herein is about 0.1 wt% to about 8 wt%, about 0.2 wt% to about 5 wt%, or about 0.2 wt% to about 2 wt%, or any single value or partial range thereof, based on the total weight of the dry capsule shell composition.

[0076] Organic acids are thought to facilitate interactions between gelatin and pectin, without being interpreted as limiting, thus forming more robust softgel capsules.

[0077] In certain embodiments, the amounts of various components (e.g., pectin, dextrose, gelatin, synthetic polymers, plasticizers, stabilizers / binders) and the ratios of various components are adjusted to control the dissolution and / or disintegration properties of the softgel capsules over a range of pH values.

[0078] For example, the gelatin-to-pectin w:w ratio in a pH-dependent shell composition may range from approximately 2:1, 3:1, 4:1, 5:1, 6:1, 7:1, 8:1, or 9:1 to approximately 10:1, 11:1, 12:1, 13:1, 14:1, 15:1, 16:1, 17:1, 18:1, 19:1, or 20:1, or any sub-range or single value within that range. In certain embodiments, a lower gelatin-to-pectin w:w ratio provides a pH-dependent shell composition that is more stable (dissolves / disintegrates more slowly, if at all) in an acidic medium (e.g., 0.1N HCl with pH adjusted with phosphate buffer, sodium hydroxide, or potassium hydroxide, optionally containing pepsin), while a higher gelatin-to-pectin w:w ratio provides a pH-dependent shell composition that is less stable (dissolves / disintegrates more quickly) in an acidic medium (e.g., 0.1N HCl with pH adjusted with phosphate buffer, sodium hydroxide, or potassium hydroxide, optionally containing pepsin). The gelatin-to-pectin w:w ratio can be adjusted to achieve a specific dissolution / disintegration time for the softgel capsule in an acidic medium having a specific pH (e.g., at least about 15 minutes, at least about 30 minutes, at least about 45 minutes, at least about 60 minutes, at least about 90 minutes, or at least about 120 minutes, such as pH 1.2, 2, 3, 4, 5, 6, or a partial range thereof) and / or a specific dissolution / disintegration time for the softgel capsule in a buffer medium having a specific pH (e.g., up to about 5 minutes, up to about 10 minutes, up to about 20 minutes, up to about 30 minutes, up to about 45 minutes, or up to about 60 minutes, such as in a biological, artificial or simulated duodenal environment and / or intestinal fluid, such as pH 6.8 phosphate buffer containing pancreatin as needed, sodium hydroxide buffer, or potassium hydroxide buffer).

[0079] Furthermore, the gelatin-to-plasticizer w:w ratio in the pH-dependent shell composition may be adjusted to achieve a specific capsule hardness level and may be in the range of about 5:1 to about 1:5, about 4:1 to about 1:4, about 3:1 to about 1:3, about 2:1 to about 1:2, about 1:1, or any single ratio or sub-range within that range.

[0080] In certain embodiments, the w:w ratio of pectin to a stabilizer and / or binder (e.g., gellan gum) is approximately 1:10 to approximately 50:1; approximately 1:5 to approximately 40:1; approximately 1:1 to approximately 25:1 or approximately 10:1 to approximately 24:1, or any single ratio value or sub-range within that range.

[0081] In certain embodiments, the w:w ratio of the synthetic polymer to pectin in the pH-dependent shell composition is about 3:1 to about 1:20, about 3:1 to about 1:15, about 3:1 to about 1:10, about 2:1 to about 1:5, about 2:1 to about 1:3, about 1:1, or any single ratio value or sub-range within that range.

[0082] In certain embodiments, the w:w ratio of the synthetic polymer to gelatin in the pH-dependent shell composition is approximately 1:3 to approximately 1:100, approximately 1:3 to approximately 1:50, approximately 1:3 to approximately 1:25, approximately 1:3 to approximately 1:20, approximately 1:3 to approximately 1:15, approximately 1:3 to approximately 1:10, or approximately 1:3 to approximately 1:5, or any single ratio value or sub-range within that range.

[0083] In certain embodiments, the w:w ratio of organic acids to pectin in the pH-dependent shell composition is about 2:1 to about 1:60, about 2:1 to about 1:40, about 2:1 to about 1:20, about 2:1 to about 1:15, about 2:1 to about 1:10, about 1:1 to about 1:5, or any single ratio value or sub-range thereof.

[0084] In certain embodiments, the w:w ratio of the organic acid to gelatin in the pH-dependent shell composition is approximately 1:15 to approximately 1:250, approximately 1:15 to approximately 1:200, approximately 1:15 to approximately 1:150, approximately 1:15 to approximately 1:100, approximately 1:20 to approximately 1:75, approximately 1:20 to approximately 1:50, or approximately 1:30 to approximately 1:50, or any single ratio value or sub-range within these.

[0085] In certain embodiments, softgel capsules prepared using the pH-dependent shell compositions described herein may have hardness ranging from about 5 N, about 6 N, about 7 N, about 8 N, about 9 N, or about 10 N to about 11 N, about 12 N, about 13 N, about 14 N, or about 15 N. Capsule hardness is determined using a hardness tester. Capsule hardness is defined as the force in Newtons required to cause a deformation of 2.0 mm in the capsule.

[0086] In certain embodiments, softgel capsules prepared using the pH-dependent shell compositions described herein may have a shell moisture content ranging from about 5%, about 6%, about 7%, about 8%, about 9%, or about 10%, to about 11%, about 12%, about 13%, about 14%, or about 15%. Shell moisture content is determined by the loss on drying method. A 1-2 gram sample of the pH-dependent capsule shell composition is placed in an oven at 105°C for 17 hours. The initial weight of the sample is recorded. After drying the sample in an oven at 105°C for 17 hours, the final weight of the sample is recorded. The percentage of weight loss, calculated according to the following formula, is defined as shell moisture content:

[0087]

number

[0088] In certain embodiments, the pH-dependent shell compositions described herein may have equilibrium relative humidity ranging from about 25%, about 28%, about 30%, about 32%, about 34%, or about 35%, to about 38%, about 40%, about 42%, about 45%, or about 50%. Equilibrium relative humidity (%) is defined as the humidity conditions under which the capsule maintains a constant total weight. It is determined using an environmental chamber maintained at a constant humidity using a saturated salt solution.

[0089] In certain embodiments, softgel capsules prepared using the pH-dependent shell compositions described herein may have burst strengths ranging from approximately 50 kg, 60 kg, 70 kg, 80 kg, or 90 kg to approximately 100 kg, 110 kg, 120 kg, 130 kg, 140 kg, or 150 kg. The burst strength is determined using a texture analyzer, which pressurizes the capsule until it bursts. The force in kilograms required to burst the capsule is defined as the burst strength.

[0090] In one embodiment, the pH-dependent shell composition and the pH-dependent softgel capsule may or may not include a pH-dependent protective film on the softgel shell.

[0091] In one embodiment, the pH-dependent shell composition and pH-dependent softgel capsule are Ca ++ (e.g., CaCl2) or Mg ++ It may contain a divalent cation salt such as (e.g., MgCl2). In another embodiment, the pH-dependent shell composition and pH-dependent softgel capsule may contain Ca ++ (e.g., CaCl2) or Mg ++ The composition may not contain or may substantially not contain divalent cation salts such as (e.g., MgCl2). In a further embodiment, the pH-dependent shell composition may contain Ca other than the amount of divalent cation salts that may be present in other components. ++ (e.g., CaCl2) or Mg ++ The step of adding a divalent cation salt (such as MgCl2) does not need to be included.

[0092] In one embodiment, the pH-dependent shell composition may optionally contain additional agents, such as stabilizers or binders (e.g., gellan gum), colorants, flavorings, sweeteners, fillers, antioxidants, diluents, pH adjusters, or other pharmaceutically acceptable excipients or additives, such as synthetic dyes and mineral oxides.

[0093] Exemplary suitable colorants may include, but are not limited to, colors such as white, black, yellow, blue, green, pink, red, orange, violet, indigo, and brown. In certain embodiments, the color of the dosage form may indicate the contents contained therein (e.g., one or more active ingredients).

[0094] Examples of suitable flavorings include, but are not limited to, “flavor extracts” obtained by extracting raw materials, such as parts of animal or plant material, often using a solvent such as ethanol or water; and may include natural essences obtained by extracting essential oils from flowers, fruits, roots, or whole plants.

[0095] Additional exemplary flavorings that may be present in the dosage form may include, but are not limited to, other flavorings or fragrances such as breath-freshening compounds like menthol, spearmint, and cinnamon, coffee beans, especially those used for oral hygiene, fruit flavorings (e.g., cherry, orange, grape, etc.), and active substances used in tooth and mouth washing, such as quaternary ammonium bases. The effect of the flavorings may be enhanced using flavor enhancers such as tartaric acid, citric acid, and vanillin.

[0096] Exemplary sweeteners may include, but are not limited to, one or more artificial sweeteners, one or more natural sweeteners, or combinations thereof. Artificial sweeteners include, for example, acesulfame and its various salts, e.g., potassium salt (available as Sunett®), alitame, aspartame (available as NutraSweet® and Equal®), aspartame-acesulfame salts (available as Twinsweet®), neohesperidin dihydrochalcone, naringin dihydrochalcone, dihydrochalcone compounds, neotame, sodium cyclamate, saccharin and its various salts, e.g., sodium salt (available as Sweet'N Low®), stevia, chloro derivatives of sucrose, e.g., sucralose (available as Kaltame® and Splenda®), and mogrosides. Natural sweeteners include, for example, glucose, dextrose, invert sugar, fructose, sucrose, glycyrrhizin; monoammonium glycyrrhizinate (sold under the trademark name MagnaSweet®); stevia (Stevia rebaudiana) (stevioside); natural potent sweeteners such as monk fruit; polyols such as sorbitol or sorbitol sorbitan solution; mannitol; xylitol; erythritol; and others.

[0097] In one embodiment, the pH-dependent shell composition comprises (a) gelatin, (b) dextrose, (c) a pH-dependent polymer (e.g., pectin such as low-methoxyl pectin), (d) a synthetic polymer in an amount of about 0.5 wt% to about 10 wt% relative to the total weight of the dry pH-dependent shell composition, (e) an organic acid if necessary, (f) a plasticizer if necessary (e.g., glycerin, sorbitol or sorbitol-sorbitan solution, and combinations thereof), and optionally (g) a stabilizer and / or binder (e.g., gellan gum). The amounts and wt:wt ratios of these components may conform to any of the values ​​or ranges described above.

[0098] In one embodiment, the pH-dependent shell composition essentially consists of (a) gelatin, (b) dextrose, (c) a pH-dependent polymer (e.g., pectin such as low-methoxyl pectin), (d) a synthetic polymer in an amount of about 0.5 wt% to about 10 wt% relative to the total weight of the dry pH-dependent shell composition, (e) an organic acid if necessary, (f) a plasticizer if necessary (e.g., glycerin, sorbitol or sorbitol-sorbitan solution, and combinations thereof), and (g) a stabilizer and / or binder if necessary (e.g., gellan gum). The amounts and wt:wt ratios of these components may conform to any of the values ​​or ranges described above.

[0099] In one embodiment, the pH-dependent shell composition comprises (a) gelatin, (b) dextrose, (c) a pH-dependent polymer (e.g., pectin such as low-methoxyl pectin), (d) a synthetic polymer in an amount of about 0.5 wt% to about 10 wt% relative to the total weight of the dry pH-dependent shell composition, (e) an organic acid if necessary, (f) a plasticizer if necessary (e.g., glycerin, sorbitol or sorbitol-sorbitan solution, and combinations thereof), and optionally (g) a stabilizer and / or binder (e.g., gellan gum). The amounts and wt:wt ratios of these components may conform to any of the above values ​​or ranges.

[0100] Dissolution and decay Throughout this disclosure, references to “dissolution” or “dissolution test” refer to results from tests performed on a USP Apparatus II using a paddle at approximately 500 to approximately 250 RPM, phosphate buffer solution, sodium hydroxide solution, or potassium hydroxide solution, in any of approximately 500 to approximately 900 ml of 0.1N HCl acidic medium (also referred to as the “Acid Stage”) adjusted to pH 1.2, 2.0, 3.0, 4.0, 5.0, and 6.0. After 2 hours, phosphate buffer solution, sodium hydroxide solution, or potassium hydroxide solution is added to adjust the pH to 6.8 (also referred to as the “pH 6.8 buffer”). The term “dissolves” in reference to the performance of softgel capsules and / or shell compositions in a two-step dissolution test may be used interchangeably with the term “break.” “Two-step dissolution test” may also be referred to herein as “two-step enteric fusion test” or “enteric fusion test.”

[0101] Throughout this disclosure, references to “disintegration” or “disintegration test” refer to the results of a test performed in a USP disintegration apparatus in approximately 900 ml of either 500 ml of any of the following 0.1N HCl acidic media (also referred to as the “acid step”), adjusted to pH 1.2, 2.0, 3.0, 4.0, 5.0, and 6.0 with phosphate buffer solution, sodium hydroxide solution, or potassium hydroxide solution. After 2 hours, the pH is adjusted to 6.8 by adding phosphate buffer solution, sodium hydroxide solution, or potassium hydroxide solution (also referred to as the “pH 6.8 buffer”). The term “disintegrates” in reference to the performance of softgel capsules and / or shell compositions in a two-step disintegration test may be used interchangeably with the term “breaks.” “Two-step disintegration test” may also be referred to herein as “two-step intestinal disintegration test” or “intestinal disintegration test.”

[0102] In certain embodiments, the shell composition does not dissolve at a pH of 1.2 in 15, 30, 45, 60, 90, or 120 minutes (for example, measured with a USP Apparatus II using a paddle at approximately 50 RPM or approximately 250 RPM in approximately 900 ml of either 0.1N HCl acidic medium, either from about 500 ml of a phosphate buffer solution, sodium hydroxide solution, or potassium hydroxide solution with pH adjusted).

[0103] In certain embodiments, the shell composition remains undissolved at a pH of 1.2 for a period of at least about 15 minutes, at least about 30 minutes, at least about 45 minutes, at least about 60 minutes, at least about 90 minutes, or at least about 120 minutes (for example, measured with a USP Apparatus II using a paddle at about 50 RPM or about 250 RPM in about 900 ml of any 0.1N HCl acidic medium, either from about 500 ml of a phosphate buffer solution, sodium hydroxide solution, or potassium hydroxide solution with pH adjusted).

[0104] In certain embodiments, the shell composition remains undissolved at a pH of 1.2 for a period of about 15 to 360 minutes, about 30 to 240 minutes, or about 45 to 180 minutes (for example, measured with a USP Apparatus II using a paddle at about 50 RPM or about 250 RPM in about 900 ml of either 0.1N HCl acidic medium, either from about 500 ml of a phosphate buffer solution, sodium hydroxide solution, or potassium hydroxide solution with pH adjusted).

[0105] In certain embodiments, the shell composition does not disintegrate at a pH of 1.2 in 15, 30, 45, 60, 90, or 120 minutes (for example, measured in a USP disintegration apparatus in approximately 900 ml of either 0.1N HCl acidic medium, either about 500 ml of which has been pH-adjusted with phosphate buffer solution, sodium hydroxide solution, or potassium hydroxide solution).

[0106] In certain embodiments, the shell composition does not disintegrate at a pH of 1.2 for a period of at least about 15 minutes, at least about 30 minutes, at least about 45 minutes, at least about 60 minutes, at least about 90 minutes, or at least about 120 minutes (for example, measured in a USP disintegration apparatus in about 900 ml of any 0.1N HCl acidic medium, from about 500 ml of any phosphate buffer solution, sodium hydroxide solution, or potassium hydroxide solution whose pH has been adjusted).

[0107] In certain embodiments, the shell composition does not disintegrate at a pH of 1.2 for a period of about 15 to 360 minutes, about 30 to 240 minutes, or about 45 to 180 minutes (for example, measured in a USP disintegration apparatus in about 900 ml of either about 500 ml of a 0.1N HCl acidic medium whose pH has been adjusted with either a phosphate buffer solution, a sodium hydroxide solution, or a potassium hydroxide solution).

[0108] In certain embodiments, the shell composition does not dissolve at a pH of 1.2–2 in 15, 30, 45, 60, 90, or 120 minutes (for example, measured with a USP Apparatus II using a paddle at approximately 50 RPM or approximately 250 RPM in approximately 900 ml of either 0.1N HCl acidic medium, either from about 500 ml of a phosphate buffer solution, sodium hydroxide solution, or potassium hydroxide solution with pH adjusted).

[0109] In certain embodiments, the shell composition remains undissolved at a pH of 1.2–2 for a period of at least about 15 minutes, at least about 30 minutes, at least about 45 minutes, at least about 60 minutes, at least about 90 minutes, or at least about 120 minutes (for example, measured with a USP Apparatus II using a paddle at about 50 RPM or about 250 RPM in about 900 ml of any of the 0.1N HCl acidic media, either from about 500 ml of a phosphate buffer solution, sodium hydroxide solution, or potassium hydroxide solution with pH adjusted).

[0110] In certain embodiments, the shell composition remains undissolved at a pH of 1.2–2 for a period of about 15–360 minutes, about 30–240 minutes, or about 45–180 minutes (for example, measured with a USP Apparatus II at about 50 RPM or about 250 RPM in about 900 ml of either 0.1N HCl acidic medium, either from about 500 ml of a phosphate buffer solution, sodium hydroxide solution, or potassium hydroxide solution with pH adjusted).

[0111] In certain embodiments, the shell composition does not disintegrate at a pH of 1.2–2 in 15, 30, 45, 60, 90, or 120 minutes (for example, measured in a USP disintegration apparatus in approximately 900 ml of either 0.1N HCl acidic medium, either 500 ml of which has been pH-adjusted with phosphate buffer solution, sodium hydroxide solution, or potassium hydroxide solution).

[0112] In certain embodiments, the shell composition does not disintegrate at a pH of 1.2–2 for a period of at least about 15 minutes, at least about 30 minutes, at least about 45 minutes, at least about 60 minutes, at least about 90 minutes, or at least about 120 minutes (for example, measured in a USP disintegration apparatus in about 900 ml of either about 500 ml of a 0.1N HCl acidic medium whose pH has been adjusted with either a phosphate buffer solution, a sodium hydroxide solution, or a potassium hydroxide solution).

[0113] In certain embodiments, the shell composition does not disintegrate at a pH of 1.2–2 for a period of about 15–360 minutes, about 30–240 minutes, or about 45–180 minutes (for example, measured in a USP disintegration apparatus in about 900 ml of either about 500 ml of a 0.1N HCl acidic medium whose pH has been adjusted with either a phosphate buffer solution, a sodium hydroxide solution, or a potassium hydroxide solution).

[0114] In certain embodiments, the shell composition does not dissolve at pH 2 in 15, 30, 45, 60, 90, or 120 minutes (for example, when measured with a USP Apparatus II using a paddle at approximately 50 RPM or approximately 250 RPM in approximately 900 ml of any of the 0.1N HCl acidic media, with pH adjusted with any of the phosphate buffer solution, sodium hydroxide solution, or potassium hydroxide solution).

[0115] In certain embodiments, the shell composition remains undissolved at pH 2 for a period of at least about 15 minutes, at least about 30 minutes, at least about 45 minutes, at least about 60 minutes, at least about 90 minutes, or at least about 120 minutes (for example, measured with a USP Apparatus II using a paddle at about 50 RPM or about 250 RPM in about 900 ml of any 0.1N HCl acidic medium, either from about 500 ml of a phosphate buffer solution, sodium hydroxide solution, or potassium hydroxide solution with pH adjusted).

[0116] In certain embodiments, the shell composition remains undissolved at pH 2 for a period of about 15 to 360 minutes, about 30 to 240 minutes, or about 45 to 180 minutes (for example, measured with a USP Apparatus II using a paddle at about 50 RPM or about 250 RPM in about 900 ml of either 0.1N HCl acidic medium, either from about 500 ml of a phosphate buffer solution, sodium hydroxide solution, or potassium hydroxide solution with pH adjusted).

[0117] In certain embodiments, the shell composition does not disintegrate at pH 2 in 15, 30, 45, 60, 90, or 120 minutes (for example, measured in a USP disintegration apparatus in approximately 900 ml of either approximately 500 ml of a 0.1N HCl acidic medium, with pH adjusted using either a phosphate buffer solution, sodium hydroxide solution, or potassium hydroxide solution).

[0118] In certain embodiments, the shell composition does not disintegrate at pH 2 for a period of at least about 15 minutes, at least about 30 minutes, at least about 45 minutes, at least about 60 minutes, at least about 90 minutes, or at least about 120 minutes (for example, measured in a USP disintegration apparatus in about 900 ml of any 0.1N HCl acidic medium, from about 500 ml of any phosphate buffer solution, sodium hydroxide solution, or potassium hydroxide solution whose pH has been adjusted).

[0119] In certain embodiments, the shell composition does not disintegrate at pH 2 for a period of about 15 to 360 minutes, about 30 to 240 minutes, or about 45 to 180 minutes (for example, measured in a USP disintegration apparatus in about 900 ml of either about 500 ml of any of the 0.1N HCl acidic media adjusted to pH with phosphate buffer solution, sodium hydroxide solution, or potassium hydroxide solution).

[0120] In certain embodiments, the shell composition does not dissolve at pH 2–3 in 15, 30, 45, 60, 90, or 120 minutes (for example, measured with a USP Apparatus II using a paddle at approximately 50 RPM or approximately 250 RPM in approximately 900 ml of either 0.1N HCl acidic medium, either from approximately 500 ml of pH-adjusted phosphate buffer solution, sodium hydroxide solution, or potassium hydroxide solution).

[0121] In certain embodiments, the shell composition remains undissolved at a pH of 2–3 for a period of at least about 15 minutes, at least about 30 minutes, at least about 45 minutes, at least about 60 minutes, at least about 90 minutes, or at least about 120 minutes (for example, measured with a USP Apparatus II using a paddle at about 50 RPM or about 250 RPM in about 900 ml of any 0.1N HCl acidic medium, either from about 500 ml of any phosphate buffer solution, sodium hydroxide solution, or potassium hydroxide solution with pH adjusted).

[0122] In certain embodiments, the shell composition remains undissolved at pH 2–3 for a period of about 15–360 minutes, about 30–240 minutes, or about 45–180 minutes (for example, measured with a USP Apparatus II using a paddle at about 50 RPM or about 250 RPM in about 900 ml of either 0.1N HCl acidic medium, either from about 500 ml of a phosphate buffer solution, sodium hydroxide solution, or potassium hydroxide solution with pH adjusted).

[0123] In certain embodiments, the shell composition does not disintegrate at pH 2–3 in 15, 30, 45, 60, 90, or 120 minutes (for example, measured in a USP disintegration apparatus in approximately 900 ml of either 0.1N HCl acidic medium, either 500 ml of which has been pH-adjusted with phosphate buffer solution, sodium hydroxide solution, or potassium hydroxide solution).

[0124] In certain embodiments, the shell composition does not disintegrate at a pH of 2–3 for a period of at least about 15 minutes, at least about 30 minutes, at least about 45 minutes, at least about 60 minutes, at least about 90 minutes, or at least about 120 minutes (for example, measured in a USP disintegration apparatus in about 900 ml of any 0.1N HCl acidic medium, from about 500 ml of any phosphate buffer solution, sodium hydroxide solution, or potassium hydroxide solution with pH adjusted).

[0125] In certain embodiments, the shell composition does not disintegrate at pH 2–3 for a period of about 15 to 360 minutes, about 30 to 240 minutes, or about 45 to 180 minutes (for example, measured in a USP disintegration apparatus in about 900 ml of either about 500 ml of any of the 0.1N HCl acidic media adjusted to pH with phosphate buffer solution, sodium hydroxide solution, or potassium hydroxide solution).

[0126] In certain embodiments, the shell composition does not dissolve at pH 3 in 15, 30, 45, 60, 90, or 120 minutes (for example, measured with a USP Apparatus II using a paddle at approximately 50 RPM or approximately 250 RPM in approximately 900 ml of any of the 0.1N HCl acidic media, either from approximately 500 ml of a phosphate buffer solution, sodium hydroxide solution, or potassium hydroxide solution with pH adjusted).

[0127] In certain embodiments, the shell composition remains undissolved at pH 3 for a period of at least about 15 minutes, at least about 30 minutes, at least about 45 minutes, at least about 60 minutes, at least about 90 minutes, or at least about 120 minutes (for example, measured with a USP Apparatus II using a paddle at about 50 RPM or about 250 RPM in about 900 ml of any 0.1N HCl acidic medium, either from about 500 ml of a phosphate buffer solution, sodium hydroxide solution, or potassium hydroxide solution with pH adjusted).

[0128] In certain embodiments, the shell composition remains undissolved at pH 3 for a period of about 15 to 360 minutes, about 30 to 240 minutes, or about 45 to 180 minutes (for example, measured with a USP Apparatus II using a paddle at about 50 RPM or about 250 RPM in about 900 ml of either 0.1N HCl acidic medium, either from about 500 ml of a phosphate buffer solution, sodium hydroxide solution, or potassium hydroxide solution with pH adjusted).

[0129] In certain embodiments, the shell composition does not disintegrate at pH 3 in 15, 30, 45, 60, 90, or 120 minutes (for example, measured in a USP disintegration apparatus in approximately 900 ml of either approximately 500 ml of a 0.1N HCl acidic medium whose pH has been adjusted with either a phosphate buffer solution, a sodium hydroxide solution, or a potassium hydroxide solution).

[0130] In certain embodiments, the shell composition does not disintegrate at pH 3 for a period of at least about 15 minutes, at least about 30 minutes, at least about 45 minutes, at least about 60 minutes, at least about 90 minutes, or at least about 120 minutes (for example, measured in a USP disintegration apparatus in about 900 ml of any 0.1N HCl acidic medium, from about 500 ml of any phosphate buffer solution, sodium hydroxide solution, or potassium hydroxide solution whose pH has been adjusted).

[0131] In certain embodiments, the shell composition does not disintegrate at pH 3 for a period of about 15 to 360 minutes, about 30 to 240 minutes, or about 45 to 180 minutes (for example, measured in a USP disintegration apparatus in about 900 ml of either about 500 ml of any of the 0.1N HCl acidic media adjusted to pH with phosphate buffer solution, sodium hydroxide solution, or potassium hydroxide solution).

[0132] In certain embodiments, the shell composition does not dissolve at pH 3–4 in 15, 30, 45, 60, 90, or 120 minutes (for example, measured with a USP Apparatus II using a paddle at approximately 50 RPM or approximately 250 RPM in approximately 900 ml of either 0.1N HCl acidic medium, either from approximately 500 ml of pH-adjusted phosphate buffer solution, sodium hydroxide solution, or potassium hydroxide solution).

[0133] In certain embodiments, the shell composition remains undissolved at a pH of 1.2 for a period of at least about 15 minutes, at least about 30 minutes, at least about 45 minutes, at least about 60 minutes, at least about 90 minutes, or at least about 120 minutes (for example, measured with a USP Apparatus II using a paddle at about 50 RPM or about 250 RPM in about 900 ml of any 0.1N HCl acidic medium, either from about 500 ml of a phosphate buffer solution, sodium hydroxide solution, or potassium hydroxide solution with pH adjusted).

[0134] In certain embodiments, the shell composition remains undissolved at a pH of 3–4 for a period of about 15–360 minutes, about 30–240 minutes, or about 45–180 minutes (for example, measured with a USP Apparatus II using a paddle at about 50 RPM or about 250 RPM in about 900 ml of either 0.1N HCl acidic medium, either from about 500 ml of a phosphate buffer solution, sodium hydroxide solution, or potassium hydroxide solution with pH adjusted).

[0135] In certain embodiments, the shell composition does not disintegrate at pH 3–4 in 15, 30, 45, 60, 90, or 120 minutes (for example, measured in a USP disintegration apparatus in approximately 900 ml of either 0.1N HCl acidic medium, either 500 ml of which has been pH-adjusted with phosphate buffer solution, sodium hydroxide solution, or potassium hydroxide solution).

[0136] In certain embodiments, the shell composition does not disintegrate at a pH of 3–4 for a period of at least about 15 minutes, at least about 30 minutes, at least about 45 minutes, at least about 60 minutes, at least about 90 minutes, or at least about 120 minutes (for example, measured in a USP disintegration apparatus in about 900 ml of any 0.1N HCl acidic medium, from about 500 ml of any phosphate buffer solution, sodium hydroxide solution, or potassium hydroxide solution with pH adjusted).

[0137] In certain embodiments, the shell composition does not disintegrate at a pH of 3–4 for a period of about 15–360 minutes, about 30–240 minutes, or about 45–180 minutes (for example, measured in a USP disintegration apparatus in about 900 ml of either about 500 ml of any of the 0.1N HCl acidic media adjusted to pH with phosphate buffer solution, sodium hydroxide solution, or potassium hydroxide solution).

[0138] In certain embodiments, the shell composition does not dissolve at pH 4 in 15, 30, 45, 60, 90, or 120 minutes (for example, measured with a USP Apparatus II using a paddle at approximately 50 RPM or approximately 250 RPM in approximately 900 ml of either of the following 0.1N HCl acidic media, with pH adjusted with either of the following: phosphate buffer solution, sodium hydroxide solution, or potassium hydroxide solution).

[0139] In certain embodiments, the shell composition remains undissolved at pH 4 for a period of at least about 15 minutes, at least about 30 minutes, at least about 45 minutes, at least about 60 minutes, at least about 90 minutes, or at least about 120 minutes (for example, measured with a USP Apparatus II using a paddle at about 50 RPM or about 250 RPM in about 900 ml of any 0.1N HCl acidic medium, either from about 500 ml of a phosphate buffer solution, sodium hydroxide solution, or potassium hydroxide solution with pH adjusted).

[0140] In certain embodiments, the shell composition remains undissolved at pH 4 for a period of about 15 to 360 minutes, about 30 to 240 minutes, or about 45 to 180 minutes (for example, measured with a USP Apparatus II using a paddle at about 50 RPM or about 250 RPM in about 900 ml of either 0.1N HCl acidic medium, either from about 500 ml of a phosphate buffer solution, sodium hydroxide solution, or potassium hydroxide solution with pH adjusted).

[0141] In certain embodiments, the shell composition does not disintegrate at pH 4 in 15, 30, 45, 60, 90, or 120 minutes (for example, measured in a USP disintegration apparatus in approximately 900 ml of either 0.1N HCl acidic medium, either approximately 500 ml of which has been pH-adjusted with phosphate buffer solution, sodium hydroxide solution, or potassium hydroxide solution).

[0142] In certain embodiments, the shell composition does not disintegrate at a pH of 4 for a period of at least about 15 minutes, at least about 30 minutes, at least about 45 minutes, at least about 60 minutes, at least about 90 minutes, or at least about 120 minutes (for example, measured in a USP disintegration apparatus in about 900 ml of any 0.1N HCl acidic medium, from about 500 ml of any phosphate buffer solution, sodium hydroxide solution, or potassium hydroxide solution whose pH has been adjusted).

[0143] In certain embodiments, the shell composition does not disintegrate at pH 4 for a period of about 15 to 360 minutes, about 30 to 240 minutes, or about 45 to 180 minutes (for example, measured in a USP disintegration apparatus in about 900 ml of either about 500 ml of any of the 0.1N HCl acidic media adjusted to pH with phosphate buffer solution, sodium hydroxide solution, or potassium hydroxide solution).

[0144] In certain embodiments, the shell composition does not dissolve at a pH of 4–5 in 15, 30, 45, 60, 90, or 120 minutes (for example, measured with a USP Apparatus II using a paddle at approximately 50 RPM or approximately 250 RPM in approximately 900 ml of either 0.1N HCl acidic medium, either from approximately 500 ml of pH-adjusted phosphate buffer solution, sodium hydroxide solution, or potassium hydroxide solution).

[0145] In certain embodiments, the shell composition remains undissolved at a pH of 4–5 for a period of at least about 15 minutes, at least about 30 minutes, at least about 45 minutes, at least about 60 minutes, at least about 90 minutes, or at least about 120 minutes (for example, measured with a USP Apparatus II using a paddle at about 50 RPM or about 250 RPM in about 900 ml of either 0.1N HCl acidic medium, either from about 500 ml of a phosphate buffer solution, sodium hydroxide solution, or potassium hydroxide solution with pH adjusted).

[0146] In certain embodiments, the shell composition remains undissolved at a pH of 4–5 for a period of about 15–360 minutes, about 30–240 minutes, or about 45–180 minutes (for example, measured with a USP Apparatus II using a paddle at about 50 RPM or about 250 RPM in about 900 ml of either 0.1N HCl acidic medium, either from about 500 ml of a phosphate buffer solution, sodium hydroxide solution, or potassium hydroxide solution with pH adjusted).

[0147] In certain embodiments, the shell composition does not disintegrate at a pH of 4–5 in 15, 30, 45, 60, 90, or 120 minutes (for example, measured in a USP disintegration apparatus in approximately 900 ml of either 0.1N HCl acidic medium, either 500 ml of which has been pH-adjusted with phosphate buffer solution, sodium hydroxide solution, or potassium hydroxide solution).

[0148] In certain embodiments, the shell composition does not disintegrate at a pH of 4–5 for a period of at least about 15 minutes, at least about 30 minutes, at least about 45 minutes, at least about 60 minutes, at least about 90 minutes, or at least about 120 minutes (for example, measured in a USP disintegration apparatus in about 900 ml of either about 500 ml of a 0.1N HCl acidic medium whose pH has been adjusted with either a phosphate buffer solution, a sodium hydroxide solution, or a potassium hydroxide solution).

[0149] In certain embodiments, the shell composition does not disintegrate at a pH of 4–5 for a period of about 15–360 minutes, about 30–240 minutes, or about 45–180 minutes (for example, measured in a USP disintegration apparatus in about 900 ml of either about 500 ml of a 0.1N HCl acidic medium whose pH has been adjusted with either a phosphate buffer solution, a sodium hydroxide solution, or a potassium hydroxide solution).

[0150] In certain embodiments, the shell composition does not dissolve at pH 5 in 15, 30, 45, 60, 90, or 120 minutes (for example, measured with a USP Apparatus II using a paddle at approximately 50 RPM or approximately 250 RPM in approximately 900 ml of either 0.1N HCl acidic medium, either from about 500 ml of pH-adjusted phosphate buffer solution, sodium hydroxide solution, or potassium hydroxide solution).

[0151] In certain embodiments, the shell composition remains undissolved at a pH of 5 for a period of at least about 15 minutes, at least about 30 minutes, at least about 45 minutes, at least about 60 minutes, at least about 90 minutes, or at least about 120 minutes (for example, measured with a USP Apparatus II using a paddle at about 50 RPM or about 250 RPM in about 900 ml of any of the 0.1N HCl acidic media, either from about 500 ml of a phosphate buffer solution, sodium hydroxide solution, or potassium hydroxide solution with pH adjusted).

[0152] In certain embodiments, the shell composition remains undissolved at a pH of 5 for a period of about 15 to 360 minutes, about 30 to 240 minutes, or about 45 to 180 minutes (for example, measured with a USP Apparatus II using a paddle at about 50 RPM or about 250 RPM in about 900 ml of either 0.1N HCl acidic medium, either from about 500 ml of a phosphate buffer solution, sodium hydroxide solution, or potassium hydroxide solution with pH adjusted).

[0153] In certain embodiments, the shell composition does not disintegrate at pH 5 in 15, 30, 45, 60, 90, or 120 minutes (for example, measured in a USP disintegration apparatus in approximately 900 ml of either 0.1N HCl acidic medium, either 500 ml of which has been pH-adjusted with phosphate buffer solution, sodium hydroxide solution, or potassium hydroxide solution).

[0154] In certain embodiments, the shell composition does not disintegrate at a pH of 5 for a period of at least about 15 minutes, at least about 30 minutes, at least about 45 minutes, at least about 60 minutes, at least about 90 minutes, or at least about 120 minutes (for example, measured in a USP disintegration apparatus in about 900 ml of any 0.1N HCl acidic medium, from about 500 ml of any phosphate buffer solution, sodium hydroxide solution, or potassium hydroxide solution whose pH has been adjusted).

[0155] In certain embodiments, the shell composition does not disintegrate at a pH of 5 for a period of about 15 to 360 minutes, about 30 to 240 minutes, or about 45 to 180 minutes (for example, measured in a USP disintegration apparatus in about 900 ml of either about 500 ml of a 0.1N HCl acidic medium whose pH has been adjusted with either a phosphate buffer solution, a sodium hydroxide solution, or a potassium hydroxide solution).

[0156] In certain embodiments, the shell composition does not dissolve at a pH of 5–6 in 15, 30, 45, 60, 90, or 120 minutes (for example, measured with a USP Apparatus II using a paddle at approximately 50 RPM or approximately 250 RPM in approximately 900 ml of either 0.1N HCl acidic medium, either from about 500 ml of a phosphate buffer solution, sodium hydroxide solution, or potassium hydroxide solution with pH adjusted).

[0157] In certain embodiments, the shell composition remains undissolved at a pH of 5–6 for a period of at least about 15 minutes, at least about 30 minutes, at least about 45 minutes, at least about 60 minutes, at least about 90 minutes, or at least about 120 minutes (for example, measured with a USP Apparatus II using a paddle at about 50 RPM or about 250 RPM in about 900 ml of any of the 0.1N HCl acidic media, either from about 500 ml of a phosphate buffer solution, sodium hydroxide solution, or potassium hydroxide solution with pH adjusted).

[0158] In certain embodiments, the shell composition remains undissolved at a pH of 5–6 for a period of about 15–360 minutes, about 30–240 minutes, or about 45–180 minutes (for example, measured with a USP Apparatus II using a paddle at about 50 RPM or about 250 RPM in about 900 ml of either 0.1N HCl acidic medium, either from about 500 ml of a phosphate buffer solution, sodium hydroxide solution, or potassium hydroxide solution with pH adjusted).

[0159] In certain embodiments, the shell composition does not disintegrate at a pH of 5-6 in 15, 30, 45, 60, 90, or 120 minutes (for example, measured in a USP disintegration apparatus in approximately 900 ml of either 0.1N HCl acidic medium, either 500 ml of which has been pH-adjusted with phosphate buffer solution, sodium hydroxide solution, or potassium hydroxide solution).

[0160] In certain embodiments, the shell composition does not disintegrate at a pH of 5–6 for a period of at least about 15 minutes, at least about 30 minutes, at least about 45 minutes, at least about 60 minutes, at least about 90 minutes, or at least about 120 minutes (for example, measured in a USP disintegration apparatus in about 900 ml of either about 500 ml of a 0.1N HCl acidic medium whose pH has been adjusted with either a phosphate buffer solution, a sodium hydroxide solution, or a potassium hydroxide solution).

[0161] In certain embodiments, the shell composition does not disintegrate at a pH of 5–6 for a period of about 15–360 minutes, about 30–240 minutes, or about 45–180 minutes (for example, measured in a USP disintegration apparatus in about 900 ml of either about 500 ml of a 0.1N HCl acidic medium whose pH has been adjusted with either a phosphate buffer solution, a sodium hydroxide solution, or a potassium hydroxide solution).

[0162] In certain embodiments, the shell composition does not dissolve at pH 6 in 15, 30, 45, 60, 90, or 120 minutes (for example, measured with a USP Apparatus II using a paddle at approximately 50 RPM or approximately 250 RPM in approximately 900 ml of either of the following 0.1N HCl acidic media, with pH adjusted using either of the following: phosphate buffer solution, sodium hydroxide solution, or potassium hydroxide solution).

[0163] In certain embodiments, the shell composition remains undissolved at a pH of 6 for a period of at least about 15 minutes, at least about 30 minutes, at least about 45 minutes, at least about 60 minutes, at least about 90 minutes, or at least about 120 minutes (for example, measured with a USP Apparatus II using a paddle at about 50 RPM or about 250 RPM in about 900 ml of any 0.1N HCl acidic medium, either from about 500 ml of a phosphate buffer solution, sodium hydroxide solution, or potassium hydroxide solution whose pH has been adjusted).

[0164] In certain embodiments, the shell composition remains undissolved at pH 6 for a period of about 15 to 360 minutes, about 30 to 240 minutes, or about 45 to 180 minutes (for example, measured with a USP Apparatus II using a paddle at about 50 RPM or about 250 RPM in about 900 ml of either 0.1N HCl acidic medium, either from about 500 ml of a phosphate buffer solution, sodium hydroxide solution, or potassium hydroxide solution with pH adjusted).

[0165] In certain embodiments, the shell composition does not disintegrate at pH 6 in 15, 30, 45, 60, 90, or 120 minutes (for example, measured in a USP disintegration apparatus in approximately 900 ml of either 0.1N HCl acidic medium, either 500 ml of which has been pH-adjusted with phosphate buffer solution, sodium hydroxide solution, or potassium hydroxide solution).

[0166] In certain embodiments, the shell composition does not disintegrate at a pH of 6 for a period of at least about 15 minutes, at least about 30 minutes, at least about 45 minutes, at least about 60 minutes, at least about 90 minutes, or at least about 120 minutes (for example, measured in a USP disintegration apparatus in about 900 ml of any 0.1N HCl acidic medium, from about 500 ml of any phosphate buffer solution, sodium hydroxide solution, or potassium hydroxide solution whose pH has been adjusted).

[0167] In certain embodiments, the shell composition does not disintegrate at a pH of 6 for a period of about 15 to 360 minutes, about 30 to 240 minutes, or about 45 to 180 minutes (for example, measured in a USP disintegration apparatus in about 900 ml of either about 500 ml of a 0.1N HCl acidic medium whose pH has been adjusted with either a phosphate buffer solution, a sodium hydroxide solution, or a potassium hydroxide solution).

[0168] In a particular embodiment, the shell composition is less than 8.4, less than 8.3, less than 8.2, less than 8.1, less than 8.0, less than 7.9, less than 7.8, less than 7.7, less than 7.6, less than 7.5, less than 7.4, less than 7.3, less than 7.2, less than 7.1, less than 7.0, less than 6.9, less than 6.8, less than 6.7, less than 6.6, less than 6.5, less than 6.4, less than 6.3, less than 6.2, less than 6.1, less than 6.0, less than 5.9, less than 5.8, less than 5.7, less than 5.6, less than 5.5, less than 5.4, less than 5.3, less than 5.2, less than 5.1, less than 5.0, less than 4.9, less than 4.8, less than 4.7, less than 4.6, less than 4.5, less than 4.4, less than 4.3, less than 4.2, less than 4.1, less than 4.0, less than 3.9, less than 3.8, 3. It will not dissolve for at least approximately 15 minutes, at least approximately 30 minutes, at least approximately 45 minutes, at least approximately 60 minutes, at least approximately 90 minutes, or at least approximately 120 minutes at a pH of less than 7, less than 3.6, less than 3.5, less than 3.4, less than 3.2, less than 3.1, less than 3.0, less than 2.9, less than 2.8, less than 2.7, less than 2.6, less than 2.5, less than 2.4, less than 2.3, less than 2.2, less than 2.1, less than 2.0, less than 1.9, less than 1.8, less than 1.7, less than 1.6, less than 1.5, less than 1.4, less than 1.3, or less than 1.2 (for example, from about 500 ml of any of phosphate buffer solution, sodium hydroxide solution, or potassium hydroxide solution with pH adjusted to any of 0.1N of (Measured using a USP Apparatus II with paddles ranging from approximately 50 RPM to approximately 250 RPM in an acidic HCl medium.)

[0169] In a particular embodiment, the shell composition is less than 8.4, less than 8.3, less than 8.2, less than 8.1, less than 8.0, less than 7.9, less than 7.8, less than 7.7, less than 7.6, less than 7.5, less than 7.4, less than 7.3, less than 7.2, less than 7.1, less than 7.0, less than 6.9, less than 6.8, less than 6.7, less than 6.6, less than 6.5, less than 6.4, less than 6.3, less than 6.2, less than 6.1, less than 6.0, less than 5.9, less than 5.8, less than 5.7, less than 5.6, less than 5.5, less than 5.4, less than 5.3, less than 5.2, less than 5.1, less than 5.0, less than 4.9, less than 4.8, less than 4.7, less than 4.6, less than 4.5, less than 4.4, less than 4.3, less than 4.2, less than 4.1, less than 4.0, 3 It will not dissolve for approximately 15 to 360 minutes, approximately 30 to 240 minutes, or approximately 45 to 180 minutes at a pH of less than 0.9, less than 3.8, less than 3.7, less than 3.6, less than 3.5, less than 3.4, less than 3.3, less than 3.2, less than 3.1, less than 3.0, less than 2.9, less than 2.8, less than 2.7, less than 2.6, less than 2.5, less than 2.4, less than 2.3, less than 2.2, less than 2.1, less than 2.0, less than 1.9, less than 1.8, less than 1.7, less than 1.6, less than 1.5, less than 1.4, less than 1.3, or less than 1.2 for a period of approximately 15 to 360 minutes, approximately 30 to 240 minutes, or approximately 45 to 180 minutes (for example, approximately 500 ml of any of any of phosphate buffer solution, sodium hydroxide solution, or potassium hydroxide solution with pH adjusted to any of 0.1N solutions, or approximately 900 ml of any of 0.1N solutions). (Measured using a USP Apparatus II with paddles ranging from approximately 50 RPM to approximately 250 RPM in an acidic HCl medium.)

[0170] In a particular embodiment, the shell composition is less than 8.4, less than 8.3, less than 8.2, less than 8.1, less than 8.0, less than 7.9, less than 7.8, less than 7.7, less than 7.6, less than 7.5, less than 7.4, less than 7.3, less than 7.2, less than 7.1, less than 7.0, less than 6.9, less than 6.8, less than 6.7, less than 6.6, less than 6.5, less than 6.4, less than 6.3, less than 6.2, less than 6.1, less than 6.0, less than 5.9, less than 5.8, less than 5.7, less than 5.6, less than 5.5, less than 5.4, less than 5.3, less than 5.2, less than 5.1, less than 5.0, less than 4.9, less than 4.8, less than 4.7, less than 4.6, less than 4.5, less than 4.4, less than 4.3, less than 4.2, less than 4.1, less than 4.0, less than 3.9, less than 3.8, 3. It does not disintegrate for at least approximately 15 minutes, at least approximately 30 minutes, at least approximately 45 minutes, at least approximately 60 minutes, at least approximately 90 minutes, or at least approximately 120 minutes at a pH of less than 7, less than 3.6, less than 3.5, less than 3.4, less than 3.3, less than 3.1, less than 3.0, less than 2.9, less than 2.8, less than 2.7, less than 2.6, less than 2.5, less than 2.4, less than 2.3, less than 2.2, less than 2.1, less than 2.0, less than 1.9, less than 1.8, less than 1.7, less than 1.6, less than 1.5, less than 1.4, less than 1.3, or less than 1.2 (for example, measured in a USP disintegration apparatus in approximately 900 ml of any 0.1N HCl acidic medium from approximately 500 ml of any phosphate buffer solution, sodium hydroxide solution, or potassium hydroxide solution whose pH has been adjusted).

[0171] In a particular embodiment, the shell composition is less than 8.4, less than 8.3, less than 8.2, less than 8.1, less than 8.0, less than 7.9, less than 7.8, less than 7.7, less than 7.6, less than 7.5, less than 7.4, less than 7.3, less than 7.2, less than 7.1, less than 7.0, less than 6.9, less than 6.8, less than 6.7, less than 6.6, less than 6.5, less than 6.4, less than 6.3, less than 6.2, less than 6.1, less than 6.0, less than 5.9, less than 5.8, less than 5.7, less than 5.6, less than 5.5, less than 5.4, less than 5.3, less than 5.2, less than 5.1, less than 5.0, less than 4.9, less than 4.8, less than 4.7, less than 4.6, less than 4.5, less than 4.4, less than 4.3, less than 4.2, less than 4.1, less than 4.0 It does not disintegrate for approximately 15 to 360 minutes, approximately 30 to 240 minutes, or approximately 45 to 180 minutes at pH values ​​below 3.9, below 3.8, below 3.7, below 3.6, below 3.5, below 3.4, below 3.3, below 3.2, below 3.1, below 3.0, below 2.9, below 2.8, below 2.7, below 2.6, below 2.5, below 2.4, below 2.3, below 2.2, below 2.1, below 2.0, below 1.9, below 1.8, below 1.7, below 1.6, below 1.5, below 1.4, below 1.3, or below 1.2 (for example, measured using a USP disintegration apparatus in approximately 900 ml of either 0.1N HCl acidic medium from either approximately 500 ml of pH-adjusted phosphate buffer solution, sodium hydroxide solution, or potassium hydroxide solution).

[0172] According to the present invention, a pH suitable for dissolving and / or disintegrating and / or rupturing the shell composition and releasing the filler material can be selected to program the release of the activator to inhibit premature release of the activator in the acidic portion of the gastrointestinal tract (e.g., the gastric environment with a pH of 1.2 to 3.5) and instead release the activator in the intended portion of the gastrointestinal tract. For example, the duodenum has a typical pH in the range of 7.0 to 8.5; the small and large intestines have a typical pH of 4.0 to 7.0; the colon has a typical pH of 6.5; and the jejunum has a typical pH of 6.1 to 7.2. In one embodiment, the shell composition may be formulated to target the release of the activator in the duodenum with a pH of about 7.0 to about 8.5. In one embodiment, the shell composition may be formulated to target the release of the activator in the small and large intestines with a pH of about 4.0 to about 7.0. In one embodiment, the shell composition may be formulated to target the release of the activator in the colon with a pH of about 6.5. In one embodiment, the shell composition may be formulated to target the release of the activator in the jejunum at a pH of about 6.1 to about 7.2.

[0173] In certain embodiments, a combination of pectin and methyl acrylic copolymer in a pH-dependent shell composition raises the capsule's break threshold to pH 7.5-8.5, providing a means for delivering the activator into the small intestine.

[0174] Preparation method The encapsulation of the filling material can be accomplished by any conventional method. For example, rotary die encapsulation may be used.

[0175] According to one embodiment, a pH-dependent softgel capsule is prepared by a process comprising: (a) preparing a filler material comprising at least one activator; and (b) encapsulating the filler material of step (a) in a pH-dependent shell composition. The encapsulation process by step (b) may further include a substep of preparing a pH-dependent shell composition by, for example, mixing gelatin, dextrose, pectin, a synthetic polymer, a plasticizer if necessary, and a stabilizer / binder if necessary. In one embodiment, the substep of preparing a pH-dependent shell composition includes, for example, mixing gelatin, dextrose, pectin, an organic acid, a plasticizer if necessary, and a stabilizer / binder if necessary.

[0176] The thickness of the pH-dependent shell composition ribbon (for example, as used during rotary die encapsulation) can also be adjusted to control the pH-dependent dissolution profile of the final pH-dependent softgel capsule. The thickness of the pH-dependent shell composition ribbon can be any of the following ranges, or any sub-range or single value, from approximately 0.02 inches, 0.022 inches, 0.024 inches, 0.026 inches, 0.028 inches, or 0.030 inches to approximately 0.032 inches, 0.034 inches, 0.036 inches, 0.038 inches, 0.04 inches, 0.042 inches, 0.044 inches, or 0.050 inches, without limitation.

[0177] In certain embodiments, pH-dependent softgel capsules (e.g., after encapsulation) may be dried and, if necessary, cured. Curing the softgel capsules may be carried out at temperatures in the range of about 25°C to about 75°C, about 25°C to about 70°C, about 30°C to about 60°C, or about 35°C to 50°C. The curing temperature should be high enough to enhance the delayed release properties of the softgel capsules, but not high enough to melt them.

[0178] The curing time may be in the range of approximately 12 to 168 hours, approximately 18 to 120 hours, approximately 24 to 72 hours, approximately 24 hours, approximately 48 hours, approximately 72 hours, or any sub-range or single value within that range. In one embodiment, the curing of the softgel capsule may be carried out at a temperature of approximately 40°C for approximately 24 hours. In one embodiment, the curing of the softgel capsule may be carried out at a temperature of approximately 40°C for approximately 48 hours. In one embodiment, the curing of the softgel capsule may be carried out at a temperature of approximately 40°C for approximately 72 hours. In certain embodiments, curing may be carried out in air (without any specific control over the nitrogen or oxygen or humidity content). In certain embodiments, curing may be carried out under inert conditions (e.g., in nitrogen).

[0179] In one embodiment, a process for preparing a pH-dependent softgel capsule comprises, essentially, or consists of, the steps of: a) preparing one of the filler materials described herein; b) encapsulating the filler material from step a) into one of the pH-dependent shell compositions described herein (e.g., by rotary die encapsulation); c) drying the encapsulated pH-dependent softgel capsule (e.g., by tumble drying or normal drying in a basket without tumbling); and optionally d) curing the pH-dependent softgel capsule according to one of the curing conditions described herein.

[0180] In certain embodiments, drying is performed at a temperature of approximately 10°C to 50°C, approximately 15°C to 40°C, or approximately 20°C to 35°C, with a relative humidity of approximately 5% to 40%, approximately 10% to 30%, or approximately 15% to 25%.

[0181] In certain embodiments, references to drying and curing should be distinguished here. The purpose of drying the delayed-release softgel capsules described herein is to remove excess water from the delayed-release softgel capsules immediately after encapsulation. Thus, the capsules become physically stable. The purpose of curing the delayed-release softgel capsules described herein is to enhance the delayed-release properties of the delayed-release softgel capsules. Therefore, the presence of a drying step is not the same as a curing step, and similarly, the presence of a curing step is not the same as a drying step.

[0182] In certain embodiments, the pH-dependent shell compositions described herein exhibit any of the delayed-release properties described herein without curing (e.g., following either the dissolution or disintegration profile described herein). For example, in certain embodiments, the inclusion of a synthetic polymer can enhance the delayed-release properties of the softgel capsule without requiring further curing of the softgel capsule.

[0183] In certain embodiments, the process for preparing the softgel capsules described herein may further include a step of washing the softgel capsules with an organic acid. Suitable organic acids include, without limitation, lactic acid, tannic acid, citric acid, acetic acid, or a combination thereof. In certain embodiments, the step of washing the softgel capsules with an organic acid further enhances the robustness of the softgel capsules and their delayed release properties (as demonstrated, for example, by achieving any one or more of the dissolution or disintegration release profiles described herein).

[0184] Soft gel capsule stability In certain embodiments, the delayed-release softgel capsules having the pH-dependent shell composition described herein are chemically and physically stable.

[0185] For example, their chemical stability can be demonstrated by the content of activators in the filler material (e.g., the content of fish oil components if the filler material contains fish oil). In certain embodiments, the content of filler material components is substantially similar (or within specifications) to the raw material before storage for up to 12 months, up to 6 months, up to 3 months, or up to 1 month (during any of these periods, under ambient conditions or under stress conditions of 40°C and 75% relative humidity).

[0186] In certain embodiments, the physical stability of a delayed-release softgel capsule can be demonstrated by the dissolution profile of the capsule in acidic and buffered media. For example, the dissolution profile of the capsule in acidic and buffered media may be substantially similar (or within specifications) to the dissolution profile of the capsule before storage after storage for up to 12 months, up to 6 months, up to 3 months, or up to 1 month (during any of these periods, under ambient conditions or under stressed conditions of 40°C and 75% relative humidity).

[0187] The term "substantially similar" can refer to a specific value that is within approximately 30%, 25%, 20%, 15%, 10%, 5%, or 1% of the corresponding comparison value. The percentages are calculated based on the nominal value of the comparison value. For example, a dissolution time range of 27 to 33 minutes may be considered within 10% of a comparison dissolution time of 30 minutes.

[0188] In certain embodiments, the pH-dependent shell compositions described herein produce robust delayed-release softgel capsules with little or no premature release of the filler material in an acidic environment (e.g., a gastric environment). For example, the delayed-release softgel capsules described herein may release up to about 10 wt%, up to about 9 wt%, up to about 8 wt%, up to about 7 wt%, up to about 60 minutes, up to about 45 minutes, up to about 30 minutes, up to about 15 minutes, up to about 10 minutes, or up to about 5 minutes of exposure to an acid stage (e.g., as defined for the dissolution or disintegration tests described herein) up to about 10 wt%, up to about 9 wt%, up to about 8 wt%, up to about 7 wt%, up to about 6 wt%, up to about 5 wt%, up to about 4 wt%, up to about 3 wt%, up to about 1 wt%, or up to 0 wt% of the filler material relative to the total weight of the filler material in the acid stage. [Examples]

[0189] Specific embodiments of the present invention will now be demonstrated by reference to the following examples. It should be understood that these examples are disclosed solely for illustrative purposes of the present invention and should not be construed as limiting the scope of the invention.

[0190] [Example 1] Addition of a synthetic polymer sealant to the wet gel mass to inhibit premature release during the acidic phase. pH-dependent shell compositions having the dry shell compositions shown in Table 1 were prepared.

[0191] [Table 1]

[0192] The synthetic polymer Kollicoat MAE-100P and ethyl methacrylate copolymer (1:1) used in this example functioned as a sealant to prevent the leakage of the filling material from the capsule closure.

[0193] Fish oil and polyethylene glycol 400 were encapsulated in pH-dependent shell compositions having the dry shell compositions shown in Table 1, and then dried. After drying, the softgel capsules were subjected to a two-step dissolution test performed on a USP Apparatus II using a 50 RPM paddle. In the first step, the softgel capsules were in the acid stage (0.1N HCl) for 2 hours (120 minutes), and in the second step, the softgel capsules were in the buffer stage (buffer solution pH 6.8). The results are summarized in Table 2.

[0194] [Table 2]

[0195] Fish oil softgel capsules (lot number 20MC-59A) before aging (T0) and after aging for 3 months at 40°C and 75% relative humidity (T3) were subjected to a two-step dissolution using a paddle speed of 100 RPM (all other dissolution test conditions were the same as those for the results shown in Table 2). These softgel capsules also remained intact in 0.1N HCl for 120 minutes and ruptured in pH 6.8 buffer (Table 3).

[0196] [Table 3]

[0197] Fish oil softgel capsules (lot number 20MC-59A) aged for 3 months at 40°C and 75% relative humidity (T3) were also subjected to a two-stage disintegration test using a USP disintegration apparatus. In the first stage, the softgel capsules were in the acid stage (0.1N HCl) for 1 hour (60 minutes), and in the second stage, the softgel capsules were in the buffer stage (buffer solution pH 6.8). In the disintegration test, the capsules remained intact for 60 minutes and ruptured in pH 6.8 buffer solution after 5 minutes (Table 4).

[0198] [Table 4]

[0199] In summary, the pH-dependent shell composition containing methacrylate-ethyl acrylate copolymer inhibited the premature release of the filler material during acid-step dissolution, even without curing the softgel capsules.

[0200] [Example 2] Addition of organic acids to pH-dependent shell compositions Organic acids were added to the wet gel mass of the pH-dependent shell composition to promote the interaction between pectin and gelatin. Exemplary organic acids tested were lactic acid and tannic acid. Table 5 shows the wet gel composition of the pH-dependent shell composition containing lactic acid.

[0201] [Table 5]

[0202] Fish oil and polyethylene glycol 400 were encapsulated in pH-dependent shell compositions having the dry shell compositions shown in Table 5, and then dried. After drying, the softgel capsules were subjected to a two-step dissolution test performed on a USP Apparatus II using a 50 RPM paddle. In the first step, the softgel capsules were in the acid stage (0.1N HCl) for 2 hours (120 minutes), and in the second step, the softgel capsules were in the buffer stage (buffer solution pH 6.8). The results are summarized in Table 6.

[0203] [Table 6]

[0204] Table 7 shows the dried shell compositions of pH-dependent shell compositions containing tannic acid.

[0205] [Table 7]

[0206] Fish oil and polyethylene glycol 400 were encapsulated in pH-dependent shell compositions having the dried shell mass compositions shown in Table 7, and then dried. After drying, the softgel capsules were subjected to a two-step dissolution test performed on a USP Apparatus II using a 50 RPM paddle. In the first step, the softgel capsules were in the acid stage (0.1N HCl) for 2 hours (120 minutes), and in the second step, the softgel capsules were in the buffer stage (buffer solution pH 6.8). The results are summarized in Table 8.

[0207] [Table 8]

[0208] The addition of organic acids to pH-dependent shell compositions improved the robustness of the shell compositions and, consequently, the softgel capsules.

[0209] [Example 3] Washing of pH-dependent shell compositions with organic acids Freshly manufactured moist fish oil capsules, encapsulated using the gel masses shown in Table 5, were washed with lactic acid and dried.

[0210] After drying, the capsules were subjected to a two-step dissolution test using a USP Apparatus II with a 50 RPM paddle. In the first step, the softgel capsules were in the acid stage (0.1N HCl) for 2 hours (120 minutes), and in the second step, the softgel capsules were in the buffer stage (buffer solution pH 6.8). The results are summarized in Table 9.

[0211] [Table 9]

[0212] Treating pH-dependent shell compositions with organic acids promoted the interaction between pectin and gelatin and inhibited their premature release.

[0213] For the sake of brevity, embodiments of the methods disclosed herein are represented and described as a series of actions. However, the actions of this disclosure can be performed in various orders and / or simultaneously, in conjunction with other actions not presented and described herein. Furthermore, not all described actions may be required to perform the methods of the disclosed subject matter. In addition, those skilled in the art will understand and recognize that the methods can be alternatively represented by state diagrams or events as a series of interrelated states.

[0214] In the foregoing description, numerous specific details, such as specific materials, dimensions, and process parameters, are given in order to provide a complete understanding of the present invention. Specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments. The words “example” or “exemplary” are used herein to mean that they serve as examples, cases, or illustrations. Any embodiment or design described herein as “example” or “exemplary” should not necessarily be construed as being preferable or advantageous to other embodiments or designs. Rather, the use of the words “example” or “exemplary” is intended to present a specific concept. Where used in this application, the term “or” is intended to mean an inclusive “or” rather than an exclusive “or.” That is, unless otherwise specified or evident from the context, “X includes A or B” is intended to mean any of the natural inclusive substitutions. That is, if X includes A; X includes B; or X includes both A and B, then “X includes A or B” is satisfied in any of the aforementioned examples. Any reference throughout this specification to “one embodiment,” “a particular embodiment,” or “one embodiment” means that any particular feature, structure, or characteristic described in relation to that embodiment is included in at least one embodiment. Therefore, the appearances of the phrases “one embodiment,” “a particular embodiment,” or “one embodiment” in various places throughout this specification do not necessarily all refer to the same embodiment.

[0215] The present invention has been described with reference to certain exemplary embodiments. Therefore, this specification and the drawings should be considered illustrative rather than restrictive. In addition to those shown and described herein, various modifications of the invention will be apparent to those skilled in the art and are intended to fall within the scope of the appended claims. The present invention also includes the following embodiments. <1> (a) Filling material; and (b) pH-dependent shell composition A delayed-release softgel capsule containing, The filling material comprises at least one activator, Delayed-release softgel capsules wherein the pH-dependent shell composition contains gelatin, pectin, dextrose, and a synthetic polymer in an amount of approximately 0.5 wt.% to approximately 10 wt.% relative to the total weight of the dry pH-dependent shell composition. <2> The delayed-release softgel capsule according to claim 1, further comprising a plasticizer in the pH-dependent shell composition. <3> The delayed-release softgel capsule according to claim 1 or 2, wherein the pectin is low-methoxyl pectin. <4> A delayed-release softgel capsule according to any one of the above 1 to 3, wherein the pectin is selected from the group consisting of amidated pectin, non-amidate pectin, and combinations thereof. <5> A delayed-release softgel capsule according to any one of 1 to 4 above, wherein the pH-dependent shell composition contains approximately 40 wt% to approximately 80 wt%, approximately 45 wt% to approximately 75 wt%, or approximately 45 wt% to approximately 65 wt% of gelatin relative to the weight of the dry pH-dependent shell composition. <6> A delayed-release softgel capsule according to any one of 1 to 5 above, wherein the pH-dependent shell composition contains about 2 wt% to about 20 wt%, about 3 wt% to about 15 wt%, or about 7 wt% to about 15 wt% of pectin relative to the weight of the dry pH-dependent shell composition. <7> A delayed-release softgel capsule according to any one of 1 to 6 above, wherein the pH-dependent shell composition contains about 0.01 wt% to about 4 wt%, about 0.05 wt% to about 0.5 wt%, or about 0.1 wt% to about 0.2 wt% of dextrose relative to the weight of the dry pH-dependent shell composition. <8> A delayed-release softgel capsule according to any one of the above 2 to 7, wherein the pH-dependent shell composition contains a plasticizer in an amount of about 15 wt% to about 40 wt%, about 20 wt% to about 35 wt%, or about 25 wt% to about 30 wt% relative to the weight of the dry pH-dependent shell composition. <9> The delayed-release softgel capsule according to any one of 1 to 8 above, wherein the gelatin is selected from the group consisting of type A gelatin, type B gelatin, and mixtures thereof. <10> A delayed-release softgel capsule according to any one of 1 to 9 above, wherein the gelatin is selected from the group consisting of fish gelatin, animal hide gelatin, bone gelatin, and mixtures thereof. <11> The delayed-release softgel capsule according to any one of claims 1 to 10, wherein the pectin is non-amidated pectin. <12> The delayed-release softgel capsule according to any one of 2 to 11 above, wherein the plasticizer is selected from the group consisting of glycerin, sorbitol, and combinations thereof. <13> A delayed-release softgel capsule according to any one of 1 to 12 above, wherein the pH-dependent shell composition contains about 1 wt.% to about 5 wt.%, about 1.5 wt.% to about 4 wt.%, or about 2 wt.% to about 3 wt.% of a synthetic polymer based on the weight of the dry pH-dependent shell composition. <14> A delayed-release softgel capsule according to any one of 1 to 13 above, wherein the synthetic polymer comprises a methacrylate-ethyl acrylate copolymer. <15> When measured using a USP Apparatus II with approximately 500 ml to 900 ml of 0.1N HCl adjusted to the acid step pH with a paddle of approximately 50 RPM to approximately 250 RPM, phosphate buffer solution, sodium hydroxide solution, or potassium hydroxide solution, the pH-dependent shell composition remains undissolved for at least approximately 15 minutes, at least approximately 30 minutes, at least approximately 45 minutes, at least approximately 60 minutes, at least approximately 90 minutes, or at least approximately 120 minutes at the acid step pH of 1.2, 2.0, 3.0, 4.0, 5.0, 6.0, or a partial range thereof; A delayed-release softgel capsule according to any one of items 1 to 14 above, wherein, when measured with a USP Apparatus II using a paddle of approximately 50 RPM to approximately 250 RPM, approximately 500 ml to approximately 900 ml of phosphate buffer solution, sodium hydroxide solution, or potassium hydroxide solution adjusted to a buffer pH, the pH-dependent shell composition dissolves in a maximum of approximately 60 minutes, approximately 45 minutes, approximately 30 minutes, approximately 15 minutes, or approximately 10 minutes at the buffer pH of approximately 6.5, approximately 6.8, approximately 7.0, approximately 7.5, approximately 8.0, or approximately 8.5. <16> When measured in a USP disintegration apparatus containing approximately 500 ml to approximately 900 ml of 0.1N HCl adjusted to the acid step pH with phosphate buffer solution, sodium hydroxide solution, or potassium hydroxide solution, the pH-dependent shell composition does not disintegrate for at least approximately 15 minutes, at least approximately 30 minutes, at least approximately 45 minutes, at least approximately 60 minutes, at least approximately 90 minutes, or at least approximately 120 minutes at the acid step pH of 1.2, 2.0, 3.0, 4.0, 5.0, 6.0, or a partial range thereof; A delayed-release softgel capsule according to any one of items 1 to 15 above, wherein, when measured using a USP disintegration apparatus with approximately 500 ml to approximately 900 ml of phosphate buffer solution, sodium hydroxide solution, or potassium hydroxide solution adjusted to a buffer pH, the pH-dependent shell composition disintegrates in a maximum of approximately 60 minutes, approximately 45 minutes, approximately 30 minutes, approximately 15 minutes, or approximately 10 minutes at the buffer pH above approximately 6.5, approximately 6.8, approximately 7.0, approximately 7.5, approximately 8.0, or approximately 8.5. <17> A delayed-release softgel capsule according to any one of 1 to 16, wherein the pH-dependent shell composition has a gelatin-to-pectin w:w ratio in the range of about 2:1 to about 20:1 or about 6:1 to about 18:1. <18> A delayed-release softgel capsule according to any one of 1 to 17, wherein the pH-dependent shell composition has a plasticizer-to-gelatin w:w ratio in the range of about 5:1 to about 1:5. <19> (a) the step of preparing a filler material containing an activator; (b) The step of encapsulating the filling material with a pH-dependent shell composition A method for preparing a delayed-release softgel capsule according to any one of items 1 to 18 above, including the above. <20> The method according to 19, further comprising the step of drying the encapsulated delayed-release softgel capsule. <21> The method according to 19 or 20, further comprising the step of curing the delayed-release softgel capsule. <22> The method according to any one of 19 to 21, further comprising the step of preparing the pH-dependent shell composition. <23> The method according to 22, wherein the preparation step includes mixing gelatin, dextrose, pectin, a synthetic polymer, and optionally a plasticizer to form a pH-dependent shell composition ribbon. <24> The method according to 23, wherein the pH-dependent shell composition ribbon has a thickness in the range of about 0.020 inches to about 0.050 inches. <25> A method for regulating the pH-dependent dissolution profile of a delayed-release softgel capsule comprising a filler material encapsulated in a pH-dependent shell composition, the method comprising the steps of adjusting the amount of pectin and synthetic polymer in the pH-dependent shell composition to achieve a target pH-dependent dissolution profile in an acidic medium and / or a buffered medium. <26> The method according to 25, further comprising the step of adjusting the wt:wt ratio of gelatin to pectin in the pH-dependent shell composition. <27> The method according to 25 or 26, further comprising the step of adjusting the amount of dextrose in the pH-dependent shell composition. <28> The method according to any one of 25 to 27, further comprising the step of adjusting the thickness of the ribbon of the pH-dependent shell composition. <29> A method for treating a condition, comprising the step of administering a delayed-release softgel capsule described in any of items 1 to 18 above to a subject requiring it. <30> (a) Filling material; and (b) pH-dependent shell composition A method for reducing belching, comprising the step of administering a delayed-release softgel capsule containing the same to a subject in need thereof, The filling material comprises at least one activator, A method wherein the pH-dependent shell composition comprises gelatin, pectin, dextrose, and a synthetic polymer in an amount of about 0.5 wt% to about 10 wt% relative to the total weight of the dry pH-dependent shell composition. <31> The method according to 30, wherein the filler material comprises fish oil, krill oil, garlic oil, polyethylene glycol, or a combination thereof. <32> When measured in a USP disintegration apparatus containing approximately 500 ml to approximately 900 ml of 0.1N HCl adjusted to an acidic pH range with phosphate buffer solution, sodium hydroxide solution, or potassium hydroxide solution, the delayed-release softgel capsules will not disintegrate for at least approximately 15 minutes, at least approximately 30 minutes, at least approximately 45 minutes, at least approximately 60 minutes, at least approximately 90 minutes, or at least approximately 120 minutes at the acidic pH range of 1.2, 2.0, 3.0, 4.0, 5.0, 6.0, or a partial range thereof; The method according to 30 or 31, wherein, when measured using a USP disintegration apparatus with approximately 500 ml to 900 ml of phosphate buffer solution, sodium hydroxide solution, or potassium hydroxide solution adjusted to a buffer pH, the delayed-release softgel capsule disintegrates in a maximum of approximately 60 minutes, approximately 45 minutes, approximately 30 minutes, approximately 15 minutes, or approximately 10 minutes at the buffer pH above approximately 6.5, approximately 6.8, approximately 7.0, approximately 7.5, approximately 8.0, or approximately 8.5. <33> (a) Filling material; and (b) pH-dependent shell composition A delayed-release softgel capsule containing, The filling material comprises at least one activator, A delayed-release softgel capsule wherein the pH-dependent shell composition comprises gelatin, pectin, dextrose, and an organic acid. <34> The delayed-release softgel capsule according to 33, wherein the pH-dependent shell composition further comprises a plasticizer. <35> The delayed-release softgel capsule according to 33 or 34, wherein the pectin is low-methoxyl pectin. <36> The delayed-release softgel capsule according to any one of 33 to 35, wherein the pectin is selected from the group consisting of amidated pectin, non-amidate pectin, and combinations thereof. <37> A delayed-release softgel capsule according to any one of 33 to 36, wherein the pH-dependent shell composition contains about 40 wt% to about 80 wt%, about 45 wt% to about 75 wt%, or about 45 wt% to about 65 wt% of gelatin relative to the weight of the dry pH-dependent shell composition. <38> The delayed-release softgel capsule according to 33 to 37, wherein the pH-dependent shell composition contains approximately 2 wt% to approximately 20 wt%, approximately 3 wt% to approximately 15 wt%, or approximately 7 wt% to approximately 15 wt% of pectin relative to the weight of the dry pH-dependent shell composition. <39> A delayed-release softgel capsule according to any one of 33 to 38, wherein the pH-dependent shell composition contains about 0.01 wt% to about 4 wt%, about 0.05 wt% to about 0.5 wt%, or about 0.1 wt% to about 0.2 wt% of dextrose relative to the weight of the dry pH-dependent shell composition. <40> The delayed-release softgel capsule according to any one of 34 to 39, wherein the pH-dependent shell composition contains a plasticizer in an amount of about 15 wt% to about 40 wt%, about 20 wt% to about 35 wt%, or about 25 wt% to about 30 wt% relative to the weight of the dry pH-dependent shell composition. <41> The delayed-release softgel capsule according to any one of the above 33 to 40, wherein the gelatin is selected from the group consisting of type A gelatin, type B gelatin and mixtures thereof. <42> The delayed-release softgel capsule according to any one of the above 33 to 41, wherein the gelatin is selected from the group consisting of fish gelatin, animal hide gelatin, bone gelatin, and mixtures thereof. <43> A delayed-release softgel capsule according to any one of the above 33 to 42, wherein the pectin is non-amidated pectin. <44> A delayed-release softgel capsule according to any one of the above 34 to 43, wherein the plasticizer is selected from the group consisting of glycerin, sorbitol, and combinations thereof. <45> A delayed-release softgel capsule according to any one of 33 to 44 above, further comprising about 1 wt.% to about 5 wt.%, about 1.5 wt.% to about 4 wt.%, or about 2 wt.% to about 3 wt.% of a synthetic polymer based on the weight of the dry pH-dependent shell composition. <46> The delayed-release softgel capsule according to 45, wherein the synthetic polymer comprises a methacrylate-ethyl acrylate copolymer. <47> When measured using a USP Apparatus II with approximately 500 ml to 900 ml of 0.1N HCl adjusted to the acid step pH with a paddle of approximately 50 RPM to approximately 250 RPM, phosphate buffer solution, sodium hydroxide solution, or potassium hydroxide solution, the pH-dependent shell composition remained undissolved for at least approximately 15 minutes, at least approximately 30 minutes, at least approximately 45 minutes, at least approximately 60 minutes, at least approximately 90 minutes, or at least approximately 120 minutes at the acid step pH of 1.2, 2.0, 3.0, 4.0, 5.0, 6.0, or a partial range thereof; A delayed-release softgel capsule according to any one of 33 to 46 above, wherein, when measured with a USP Apparatus II using a paddle of approximately 50 RPM to approximately 250 RPM, approximately 500 ml to approximately 900 ml of phosphate buffer solution, sodium hydroxide solution, or potassium hydroxide solution adjusted to a buffer pH, the pH-dependent shell composition dissolves in a maximum of approximately 60 minutes, approximately 45 minutes, approximately 30 minutes, approximately 15 minutes, or approximately 10 minutes at the buffer pH of approximately 6.5, approximately 6.8, approximately 7.0, approximately 7.5, approximately 8.0, or approximately 8.5. <48> When measured using a USP disintegration apparatus with approximately 500 ml to approximately 900 ml of 0.1N HCl adjusted to the acid step pH with phosphate buffer solution, sodium hydroxide solution, or potassium hydroxide solution, the pH-dependent shell composition does not disintegrate for at least approximately 15 minutes, at least approximately 30 minutes, at least approximately 45 minutes, at least approximately 60 minutes, at least approximately 90 minutes, or at least approximately 120 minutes at the acid step pH of 1.2, 2.0, 3.0, 4.0, 5.0, 6.0, or a partial range thereof; A delayed-release softgel capsule according to any one of the above 33 to 47, wherein, when measured using a USP disintegration apparatus of approximately 500 ml to approximately 900 ml of phosphate buffer solution, sodium hydroxide solution, or potassium hydroxide solution adjusted to a buffer pH, the pH-dependent shell composition disintegrates in a maximum of approximately 60 minutes, approximately 45 minutes, approximately 30 minutes, approximately 15 minutes, or approximately 10 minutes at the buffer pH above approximately 6.5, approximately 6.8, approximately 7.0, approximately 7.5, approximately 8.0, or approximately 8.5. <49> A delayed-release softgel capsule according to any one of the above 33 to 48, wherein the pH-dependent shell composition has a gelatin-to-pectin w:w ratio in the range of about 2:1 to about 20:1 or about 6:1 to about 18:1. <50> A delayed-release softgel capsule according to any one of the above 33 to 49, wherein the pH-dependent shell composition has a plasticizer-to-gelatin w:w ratio in the range of about 5:1 to about 1:5. <51> A delayed-release softgel capsule according to any one of the above 33 to 50, wherein the organic acid comprises at least one of lactic acid, tannic acid, or a combination thereof. <52> A delayed-release softgel capsule according to any one of the above 33 to 51, wherein the organic acid is present in the pH-dependent shell composition in an amount of about 0.1 wt% to about 8 wt%, about 0.2 wt% to about 5 wt%, or about 0.2 wt% to about 2 wt% relative to the total weight of the dry pH-dependent shell composition. <53> A method for preparing a delayed-release softgel capsule according to any of the above 33 to 50, (a) A step of preparing a filler material containing an activator; (b) The step of encapsulating the filling material with a pH-dependent shell composition. A method that includes this. <54> The method according to 53, further comprising the step of washing the enclosed filling material with an organic acid. <55> The method according to 54, wherein the organic acid comprises at least one of lactic acid, tannic acid, or a combination thereof. <56> The method according to 54 or 55, further comprising the step of drying the encapsulated delayed-release softgel capsule. <57> The method according to any one of 54 to 56, further comprising the step of curing the delayed-release softgel capsule. <58> The method according to any one of 54 to 57, further comprising the step of preparing the pH-dependent shell composition. <59> The method according to 58, wherein the preparation step includes mixing gelatin, dextrose, pectin, organic acid, a plasticizer if necessary, a stabilizer / binder if necessary, and a synthetic polymer if necessary to form a pH-dependent shell composition ribbon. <60> The method according to 59, wherein the pH-dependent shell composition ribbon has a thickness in the range of about 0.020 inches to about 0.050 inches. <61> A method for regulating the pH-dependent dissolution profile of a delayed-release softgel capsule comprising a filler material encapsulated in a pH-dependent shell composition, the method comprising the steps of adjusting the amount of pectin and organic acid in the pH-dependent shell composition to achieve a target pH-dependent dissolution profile in an acidic medium and / or a buffer medium. <62> The method according to 61, further comprising the step of adjusting the wt:wt ratio of gelatin to pectin in the pH-dependent shell composition. <63> The method according to 61 or 62, further comprising the step of adjusting the amount of dextrose in the pH-dependent shell composition. <64> The method according to any one of 61 to 63, further comprising the step of adjusting the thickness of the ribbon of the pH-dependent shell composition. <65> (a) Filling material; and (b) pH-dependent shell composition A method for reducing belching, comprising the step of administering a delayed-release softgel capsule containing the same to a subject in need thereof, The filling material comprises at least one activator, A method wherein the pH-dependent shell composition comprises gelatin, pectin, dextrose, and an organic acid. <66> The method according to 65, wherein the filling material comprises fish oil, krill oil, garlic oil, polyethylene glycol, or a combination thereof. <67> When measured in a USP disintegration apparatus containing approximately 500 ml to approximately 900 ml of 0.1N HCl adjusted to an acidic pH range with phosphate buffer solution, sodium hydroxide solution, or potassium hydroxide solution, the delayed-release softgel capsules will not disintegrate for at least approximately 15 minutes, at least approximately 30 minutes, at least approximately 45 minutes, at least approximately 60 minutes, at least approximately 90 minutes, or at least approximately 120 minutes at the acidic pH range of 1.2, 2.0, 3.0, 4.0, 5.0, 6.0, or a partial range thereof; The method according to 65 or 66, wherein, when measured using a USP disintegration apparatus with approximately 500 ml to 900 ml of phosphate buffer solution, sodium hydroxide solution, or potassium hydroxide solution adjusted to a buffer pH, the delayed-release softgel capsule disintegrates in a maximum of approximately 60 minutes, approximately 45 minutes, approximately 30 minutes, approximately 15 minutes, or approximately 10 minutes at the buffer pH above approximately 6.5, approximately 6.8, approximately 7.0, approximately 7.5, approximately 8.0, or approximately 8.5. <68> (a) Filling material; and (b) pH-dependent shell composition A delayed-release softgel capsule containing, The filling material comprises at least one activator, A delayed-release softgel capsule wherein the pH-dependent shell composition contains approximately 0.5 wt.% to approximately 10 wt.% of a synthetic polymer relative to the total weight of the film-forming agent and the dry pH-dependent shell composition. <69> The delayed-release softgel capsule according to 68, wherein the pH-dependent shell composition further comprises at least one of gelatin, dextrose, or pectin. <70> The delayed-release softgel capsule according to 68 or 69, wherein the film-forming agent comprises a non-animal-derived gelling agent including carrageenan, starch, pregelatinized starch, xanthan gum, agar, pectin, alginate, sugar, high molecular weight polyethylene glycol, sugar-derived alcohol, cellulose derivative, cellulose polymer, hydroxyethylcellulose, hydroxypropylcellulose, hydroxypropylmethylcellulose, carboxymethylcellulose, microcrystalline cellulose, attapulgite, bentonite, dextrin, alginate, kaolin, lecithin, aluminum magnesium silicate, carbomer, carbopole, silicon dioxide, curdlan, ferceleran, albumin, soy protein, chitosan, or a combination thereof. <71> A delayed-release softgel capsule according to any one of 68 to 70, wherein the pH-dependent shell composition contains the synthetic polymer in an amount of about 1 wt.% to about 5 wt.%, about 1.5 wt.% to about 4 wt.%, or about 2 wt.% to about 3 wt.% based on the weight of the dry pH-dependent shell composition. <72> A delayed-release softgel capsule according to any one of 68 to 71, wherein the synthetic polymer comprises a methacrylate-ethyl acrylate copolymer. <73> When measured in a USP decay apparatus containing approximately 500 ml to 900 ml of 0.1N HCl adjusted to acidic pH ranges with phosphate buffer solution, sodium hydroxide solution, or potassium hydroxide solution, it does not decay for at least approximately 15 minutes, at least approximately 30 minutes, at least approximately 45 minutes, at least approximately 60 minutes, at least approximately 90 minutes, or at least approximately 120 minutes at the aforementioned acidic pH ranges of 1.2, 2.0, 3.0, 4.0, 5.0, 6.0, or a partial range thereof; A delayed-release softgel capsule according to any one of items 68 to 72 above, which disintegrates in a maximum of approximately 60 minutes, approximately 45 minutes, approximately 30 minutes, approximately 15 minutes, or approximately 10 minutes at a buffer pH above approximately 6.5, approximately 6.8, approximately 7.0, approximately 7.5, approximately 8.0, or approximately 8.5, as measured using a USP disintegration apparatus in approximately 500 ml to approximately 900 ml of phosphate buffer solution, sodium hydroxide solution, or potassium hydroxide solution adjusted to a buffer pH. <74> When measured using a USP Apparatus II with approximately 500 ml to 900 ml of 0.1N HCl adjusted to the acid step pH with a paddle of approximately 50 RPM to approximately 250 RPM, phosphate buffer solution, sodium hydroxide solution, or potassium hydroxide solution, it remains undissolved for at least approximately 15 minutes, at least approximately 30 minutes, at least approximately 45 minutes, at least approximately 60 minutes, at least approximately 90 minutes, or at least approximately 120 minutes at the aforementioned acid step pH values ​​of 1.2, 2.0, 3.0, 4.0, 5.0, 6.0, or a partial range thereof; A delayed-release softgel capsule according to any of items 68 to 73 above, which dissolves in a maximum of approximately 60 minutes, approximately 45 minutes, approximately 30 minutes, approximately 15 minutes, or approximately 10 minutes at a buffer pH of approximately 6.5, approximately 6.8, approximately 7.0, approximately 7.5, approximately 8.0, or approximately 8.5, as measured by a USP Apparatus II using a paddle at approximately 50 RPM to approximately 250 RPM, approximately 500 ml to approximately 900 ml of phosphate buffer solution, sodium hydroxide solution, or potassium hydroxide solution adjusted to a buffer pH. <75> (a) Filling material; and (b) pH-dependent shell composition A delayed-release softgel capsule containing, The filling material comprises at least one activator, A delayed-release softgel capsule comprising the pH-dependent shell composition containing a film-forming agent and an organic acid. <76> The delayed-release softgel capsule according to claim 75, wherein the pH-dependent shell composition further comprises at least one of a synthetic polymer, gelatin, dextrose, or pectin. <77> The delayed-release softgel capsule according to 75 or 76, wherein the film-forming agent comprises a non-animal-derived gelling agent including carrageenan, starch, pregelatinized starch, xanthan gum, agar, pectin, alginate, sugar, high molecular weight polyethylene glycol, sugar-derived alcohol, cellulose derivative, cellulose polymer, hydroxyethylcellulose, hydroxypropylcellulose, hydroxypropylmethylcellulose, carboxymethylcellulose, microcrystalline cellulose, attapulgite, bentonite, dextrin, alginate, kaolin, lecithin, aluminum magnesium silicate, carbomer, carbopole, silicon dioxide, curdlan, ferceleran, albumin, soy protein, chitosan, or a combination thereof. <78> A delayed-release softgel capsule according to any one of 75 to 77, wherein the organic acid comprises at least one of lactic acid, tannic acid, acetic acid, citric acid, or a combination thereof. <79> A delayed-release softgel capsule according to any one of 75 to 78, wherein the organic acid is present in the pH-dependent shell composition in an amount of about 0.1 wt% to about 8 wt%, about 0.2 wt% to about 5 wt%, or about 0.2 wt% to about 2 wt%, relative to the total weight of the dry pH-dependent shell composition. <80> A delayed-release softgel capsule according to any one of 75 to 79, comprising organic acid washing containing lactic acid, tannic acid, acetic acid, citric acid, or a combination thereof. <81> When measured in a USP decay apparatus containing approximately 500 ml to 900 ml of 0.1N HCl adjusted to acidic pH ranges with phosphate buffer solution, sodium hydroxide solution, or potassium hydroxide solution, it does not decay for at least approximately 15 minutes, at least approximately 30 minutes, at least approximately 45 minutes, at least approximately 60 minutes, at least approximately 90 minutes, or at least approximately 120 minutes at the aforementioned acidic pH ranges of 1.2, 2.0, 3.0, 4.0, 5.0, 6.0, or a partial range thereof; A delayed-release softgel capsule according to any one of the above 75 to 80, which disintegrates in a maximum of approximately 60 minutes, approximately 45 minutes, approximately 30 minutes, approximately 15 minutes, or approximately 10 minutes at a buffer pH above approximately 6.5, approximately 6.8, approximately 7.0, approximately 7.5, approximately 8.0, or approximately 8.5, as measured using a USP disintegration apparatus. <82> When measured using a USP Apparatus II with approximately 500 ml to 900 ml of 0.1N HCl adjusted to the acid step pH with a paddle of approximately 50 RPM to approximately 250 RPM, phosphate buffer solution, sodium hydroxide solution, or potassium hydroxide solution, it remains undissolved for at least approximately 15 minutes, at least approximately 30 minutes, at least approximately 45 minutes, at least approximately 60 minutes, at least approximately 90 minutes, or at least approximately 120 minutes at the aforementioned acid step pH values ​​of 1.2, 2.0, 3.0, 4.0, 5.0, 6.0, or a partial range thereof; A delayed-release softgel capsule according to any one of items 75 to 81 above, which dissolves in a maximum of approximately 60 minutes, approximately 45 minutes, approximately 30 minutes, approximately 15 minutes, or approximately 10 minutes at a buffer pH of approximately 6.5, approximately 6.8, approximately 7.0, approximately 7.5, approximately 8.0, or approximately 8.5, when measured with a USP Apparatus II using a paddle of approximately 50 RPM to approximately 250 RPM, approximately 500 ml to approximately 900 ml of phosphate buffer solution, sodium hydroxide solution, or potassium hydroxide solution adjusted to a buffer pH.

Claims

1. (a) Filling material; and (b) pH-dependent shell composition A delayed-release softgel capsule containing, The filling material comprises at least one activator, The pH-dependent shell composition comprises gelatin, pectin, dextrose, and a synthetic polymer containing 0.5 wt.% to 10 wt.% of ethyl methacrylate copolymer relative to the total weight of the dry pH-dependent shell composition. A delayed-release softgel capsule wherein the pH-dependent shell composition has a gelatin-to-pectin w:w ratio in the range of 6:1 to 20:

1.

2. (a) Filling material; and (b) pH-dependent shell composition A delayed-release softgel capsule containing, The filling material comprises at least one activator, The pH-dependent shell composition comprises gelatin, pectin, dextrose, and an organic acid. A delayed-release softgel capsule wherein the pH-dependent shell composition has a gelatin-to-pectin w:w ratio in the range of 6:1 to 20:

1.

3. The delayed-release softgel capsule according to claim 1 or 2, wherein the pH-dependent shell composition further comprises a plasticizer.

4. The delayed-release softgel capsule according to any one of claims 1 to 3, wherein the pectin is low-methoxyl pectin.

5. The delayed-release softgel capsule according to any one of claims 1 to 4, wherein the pectin is selected from the group consisting of amidated pectin, non-amidate pectin, and combinations thereof.

6. The delayed-release softgel capsule according to any one of claims 1 to 5, wherein the pH-dependent shell composition comprises 40 wt% to 80 wt%, 45 wt% to 75 wt%, or 45 wt% to 65 wt% of gelatin based on the weight of the dry pH-dependent shell composition.

7. The delayed-release softgel capsule according to any one of claims 1 to 6, wherein the pH-dependent shell composition comprises 2 wt% to 20 wt%, 3 wt% to 15 wt%, or 7 wt% to 15 wt% of pectin based on the weight of the dry pH-dependent shell composition.

8. The delayed-release softgel capsule according to any one of claims 1 to 7, wherein the pH-dependent shell composition comprises 0.01 wt% to 4 wt%, 0.05 wt% to 0.5 wt%, or 0.1 wt% to 0.2 wt% of dextrose based on the weight of the dry pH-dependent shell composition.

9. The delayed-release softgel capsule according to claim 3, wherein the pH-dependent shell composition contains 15 wt% to 40 wt%, 20 wt% to 35 wt%, or 25 wt% to 30 wt% of a plasticizer based on the weight of the dry pH-dependent shell composition.

10. The delayed-release softgel capsule according to any one of claims 1 to 9, wherein the gelatin is selected from the group consisting of type A gelatin, type B gelatin, and mixtures thereof.

11. The delayed-release softgel capsule according to any one of claims 1 to 10, wherein the gelatin is selected from the group consisting of fish gelatin, animal hide gelatin, bone gelatin, and mixtures thereof.

12. The delayed-release softgel capsule according to any one of claims 1 to 11, wherein the pectin is non-amidated pectin.

13. The delayed-release softgel capsule according to claim 3, wherein the plasticizer is selected from the group consisting of glycerin, sorbitol, and combinations thereof.

14. The delayed-release softgel capsule according to claim 1, wherein the pH-dependent shell composition comprises 1 wt.% to 5 wt.%, 1.5 wt.% to 4 wt.%, or 2 wt.% to 3 wt.% of a synthetic polymer based on the weight of the dry pH-dependent shell composition.

15. When measured using a USP Apparatus II with a 50 RPM to 250 RPM paddle, phosphate buffer solution, sodium hydroxide solution, or potassium hydroxide solution adjusted to the acid step pH, the pH-dependent shell composition remains undissolved for at least 15 minutes, at least 30 minutes, at least 45 minutes, at least 60 minutes, at least 90 minutes, or at least 120 minutes at the acid step pH of 1.2, 2.0, 3.0, 4.0, 5.0, 6.0, or a partial range thereof; A delayed-release softgel capsule according to any one of claims 1 to 14, wherein, when measured with a USP Apparatus II using a 50 RPM to 250 RPM paddle and 500 ml to 900 ml of phosphate buffer solution, sodium hydroxide solution, or potassium hydroxide solution adjusted to a buffer pH, the pH-dependent shell composition dissolves in a maximum of 60 minutes, a maximum of 45 minutes, a maximum of 30 minutes, a maximum of 15 minutes, or a maximum of 10 minutes at a buffer pH above 6.5, above 6.8, above 7.0, above 7.5, above 8.0, or above 8.

5.

16. When measured using a USP disintegration apparatus with 500 ml to 900 ml of 0.1 N HCl adjusted to an acidic pH range with phosphate buffer solution, sodium hydroxide solution, or potassium hydroxide solution, the pH-dependent shell composition does not disintegrate for at least 15 minutes, at least 30 minutes, at least 45 minutes, at least 60 minutes, at least 90 minutes, or at least 120 minutes at the acidic pH range of 1.2, 2.0, 3.0, 4.0, 5.0, 6.0, or a partial range thereof; A delayed-release softgel capsule according to any one of claims 1 to 15, wherein, when measured using a USP disintegration apparatus of 500 ml to 900 ml of phosphate buffer solution, sodium hydroxide solution, or potassium hydroxide solution adjusted to a buffer pH, the pH-dependent shell composition disintegrates in a maximum of 60 minutes, a maximum of 45 minutes, a maximum of 30 minutes, a maximum of 15 minutes, or a maximum of 10 minutes at the buffer pH above 6.5, above 6.8, above 7.0, above 7.5, above 8.0, or above 8.

5.

17. The delayed-release softgel capsule according to any one of claims 1 to 16, wherein the pH-dependent shell composition has a gelatin-to-pectin w:w ratio in the range of 6:1 to 18:

1.

18. The delayed-release softgel capsule according to claim 3, wherein the pH-dependent shell composition has a plasticizer-to-gelatin w:w ratio in the range of 5:1 to 1:

5.

19. A delayed-release softgel capsule according to any one of claims 1 to 18 for reducing the occurrence of belching.

20. The delayed-release softgel capsule according to claim 2, further comprising 1 wt.% to 5 wt.%, 1.5 wt.% to 4 wt.%, or 2 wt.% to 3 wt.% of a synthetic polymer based on the weight of the dry pH-dependent shell composition.

21. The delayed-release softgel capsule according to claim 20, wherein the synthetic polymer comprises a methacrylate-ethyl acrylate copolymer.

22. The delayed-release softgel capsule according to claim 2, wherein the organic acid comprises at least one of lactic acid, tannic acid, or a combination thereof.

23. The delayed-release softgel capsule according to claim 2, wherein the organic acid is present in the pH-dependent shell composition in an amount of 0.1 wt% to 8 wt%, 0.2 wt% to 5 wt%, or 0.2 wt% to 2 wt% based on the total weight of the dry pH-dependent shell composition.

24. (a) Filling material; and (b) pH-dependent shell composition A delayed-release softgel capsule containing, The filling material comprises at least one activator, The pH-dependent shell composition comprises a film-forming agent containing pectin, and a synthetic polymer containing 0.5 wt.% to 10 wt.% of ethyl methacrylate copolymer relative to the total weight of the dry pH-dependent shell composition. The pH-dependent shell composition further comprises gelatin and dextrose, A delayed-release softgel capsule wherein the pH-dependent shell composition has a gelatin-to-pectin w:w ratio in the range of 6:1 to 20:

1.

25. The delayed-release softgel capsule according to claim 24, wherein the film-forming agent further comprises a non-animal-derived gelling agent comprising carrageenan, starch, pregelatinized starch, xanthan gum, agar, alginate, sugar, high molecular weight polyethylene glycol, sugar-derived alcohol, cellulose derivative, cellulose polymer, hydroxyethylcellulose, hydroxypropylcellulose, hydroxypropylmethylcellulose, carboxymethylcellulose, microcrystalline cellulose, attapulgite, bentonite, dextrin, alginate, kaolin, lecithin, aluminum magnesium silicate, carbomer, carbopole, silicon dioxide, curdlan, ferceleran, albumin, soy protein, chitosan, or a combination thereof.

26. The delayed-release softgel capsule according to claim 24 or 25, wherein the pH-dependent shell composition comprises the synthetic polymer in an amount of 1 wt.% to 5 wt.%, 1.5 wt.% to 4 wt.%, or 2 wt.% to 3 wt.%, based on the weight of the dry pH-dependent shell composition.

27. When measured using a USP decay apparatus with 500 ml to 900 ml of 0.1 N HCl adjusted to acidic pH ranges with phosphate buffer solution, sodium hydroxide solution, or potassium hydroxide solution, it does not decay for at least 15 minutes, at least 30 minutes, at least 45 minutes, at least 60 minutes, at least 90 minutes, or at least 120 minutes at acidic pH ranges of 1.2, 2.0, 3.0, 4.0, 5.0, 6.0, or a partial range thereof; A delayed-release softgel capsule according to any one of claims 24 to 26, which disintegrates in a maximum of 60 minutes, a maximum of 45 minutes, a maximum of 30 minutes, a maximum of 15 minutes, or a maximum of 10 minutes at a buffer pH above 6.5, above 6.8, above 7.0, above 7.5, above 8.0, or above 8.5, as measured by a USP disintegration apparatus of 500 ml to 900 ml of phosphate buffer solution, sodium hydroxide solution, or potassium hydroxide solution adjusted to a buffer pH.

28. When measured with a USP Apparatus II using a paddle at 50 RPM to 250 RPM, phosphate buffer solution, sodium hydroxide solution, or potassium hydroxide solution, the substance remained undissolved at the aforementioned acid-step pH values ​​of 1.2, 2.0, 3.0, 4.0, 5.0, 6.0, or a partial range thereof, for at least 15 minutes, at least 30 minutes, at least 45 minutes, at least 60 minutes, at least 90 minutes, or at least 120 minutes; A delayed-release softgel capsule according to any one of claims 24 to 27, which dissolves in a maximum of 60 minutes, a maximum of 45 minutes, a maximum of 30 minutes, a maximum of 15 minutes, or a maximum of 10 minutes at a buffer pH of above 6.5, above 6.8, above 7.0, above 7.5, above 8.0, or above 8.5, as measured by a USP Apparatus II using a paddle at any of 50 RPM to 250 RPM and 500 ml to 900 ml of phosphate buffer solution, sodium hydroxide solution, or potassium hydroxide solution adjusted to a buffer pH.

29. (a) Filling material; and (b) pH-dependent shell composition A delayed-release softgel capsule containing, The filling material comprises at least one activator, The pH-dependent shell composition comprises a film-forming agent containing pectin, an organic acid, gelatin, and dextrose. A delayed-release softgel capsule wherein the pH-dependent shell composition has a gelatin-to-pectin w:w ratio in the range of 6:1 to 20:

1.

30. The delayed-release softgel capsule according to claim 29, wherein the pH-dependent shell composition further comprises a synthetic polymer.

31. The delayed-release softgel capsule according to claim 29 or 30, wherein the film-forming agent further comprises a non-animal-derived gelling agent comprising carrageenan, starch, pregelatinized starch, xanthan gum, agar, alginate, sugar, high molecular weight polyethylene glycol, sugar-derived alcohol, cellulose derivative, cellulose polymer, hydroxyethylcellulose, hydroxypropylcellulose, hydroxypropylmethylcellulose, carboxymethylcellulose, microcrystalline cellulose, attapulgite, bentonite, dextrin, alginate, kaolin, lecithin, aluminum magnesium silicate, carbomer, carbopole, silicon dioxide, curdlan, ferceleran, albumin, soy protein, chitosan, or a combination thereof.

32. The delayed-release softgel capsule according to any one of claims 29 to 31, wherein the organic acid comprises at least one of lactic acid, tannic acid, acetic acid, citric acid, or a combination thereof.

33. The delayed-release softgel capsule according to any one of claims 29 to 32, wherein the organic acid is present in the pH-dependent shell composition in an amount of 0.1 wt% to 8 wt%, 0.2 wt% to 5 wt%, or 0.2 wt% to 2 wt% based on the total weight of the dry pH-dependent shell composition.

34. When measured using a USP decay apparatus with 500 ml to 900 ml of 0.1 N HCl adjusted to acidic pH ranges with phosphate buffer solution, sodium hydroxide solution, or potassium hydroxide solution, it does not decay for at least 15 minutes, at least 30 minutes, at least 45 minutes, at least 60 minutes, at least 90 minutes, or at least 120 minutes at acidic pH ranges of 1.2, 2.0, 3.0, 4.0, 5.0, 6.0, or a partial range thereof; A delayed-release softgel capsule according to any one of claims 29 to 33, which disintegrates in a maximum of 60 minutes, a maximum of 45 minutes, a maximum of 30 minutes, a maximum of 15 minutes, or a maximum of 10 minutes at a buffer pH above 6.5, above 6.8, above 7.0, above 7.5, above 8.0, or above 8.5, as measured by a USP disintegration apparatus of 500 ml to 900 ml of phosphate buffer solution, sodium hydroxide solution, or potassium hydroxide solution adjusted to a buffer pH.

35. When measured with a USP Apparatus II using a paddle at 50 RPM to 250 RPM, phosphate buffer solution, sodium hydroxide solution, or potassium hydroxide solution, the substance remained undissolved at the aforementioned acid-step pH values ​​of 1.2, 2.0, 3.0, 4.0, 5.0, 6.0, or a partial range thereof, for at least 15 minutes, at least 30 minutes, at least 45 minutes, at least 60 minutes, at least 90 minutes, or at least 120 minutes; A delayed-release softgel capsule according to any one of claims 29 to 34, which dissolves in a maximum of 60 minutes, a maximum of 45 minutes, a maximum of 30 minutes, a maximum of 15 minutes, or a maximum of 10 minutes at a buffer pH of above 6.5, above 6.8, above 7.0, above 7.5, above 8.0, or above 8.5, as measured by a USP Apparatus II using a paddle at any of 50 RPM to 250 RPM and 500 ml to 900 ml of phosphate buffer solution, sodium hydroxide solution, or potassium hydroxide solution adjusted to a buffer pH.

Images