147 results about "Prolonged release" patented technology

Drug tablets that include a prolonged-release core and an immediate-release layer or shell are prepared with a thin barrier layer of drug-free polymer between the prolonged-release and immediate-release portions of the tablet. The barrier layer is penetrable by gastrointestinal fluid, thereby providing full access of the gastrointestinal fluid to the prolonged-release core, but remains intact during the application of the immediate-release layer, substantially reducing or eliminating any penetration of the immediate-release drug into the prolonged-release portion.

The present invention relates to a novel controlled release carrier system for pH or salt triggered release and targeted delivery of fragrances and other active ingredients onto fabric, hair, skin, and other biological surfaces and which provides prolonged release of fragrances and other active ingredients over an extended period of time, or yields a high impact fragrance “burst” upon treating the target surface with heat (blow drying the hair, ironing the fabric). The controlled delivery system of the present invention is substantially a free-flowing powder formed of solid hydrophobic nano-spheres comprising the fragrance and other active ingredients that are encapsulated in a pH or salt sensitive micro-spheres. Also described are processes for preparing such compositions and processes for using same. Furthermore, certain components of the aforementioned compositions in combination with one another are novel, and other components have novel uses in increasing fragrance substantivity, particularly in fabric, hair, and skin care preparations. The invention further pertains to consumer and diversified products comprising the controlled release system of the present invention.

Personal care and hygiene formulations for topical application to mucosal surfaces. These formulations include an amphiphilic lipid carrier in the form of a colloidal composition which can include a micellar aggregate or mixed micelles dispersed in a continuous aqueous phase, or an emulsion of lipid droplets suspended in a continuous aqueous phase, and an active agent which is an anti-microbial agent. The lipid carrier has high adhesiveness to mucous membranes such as the soft tissues of the oral cavity. The lipid carrier also has a high load capacity for the active agent to be carried to these tissues. These formulations have the desirable properties of carrying a large amount of active agent for controlled and prolonged release thereof at the desired site, such as mucous membrane surfaces and surrounding tissue. Accordingly, the present invention provides a formulation for oral or topical application including an anti-microbial agent and a lipid. The agent is held by the carrier through a hydrophobic interaction and is released from the carrier in a controlled manner over a prolonged period of time. The lipid is also characterized by having a high adhesive capability towards mucous membrane surfaces. The lipid and the agent are preferably present in a ratio in a range of from about 1:10 to 10:1, more preferably from about 1:5 to about 5:1, and most preferably from about 1:3 to about 3:1 in the formulation.

The present invention provides microspheres intended to be administered by injection comprising a protein active ingredient and an agent coating the active ingredient intended to prolong its release, wherein they are free of any trace of organic solvent and they can be obtained according to a coating method involving bringing the active ingredient and the coating agent into contact, with stirring, in a supercritical fluid, said coating agent being soluble in this supercritical fluid.

Biodegradable polymeric microparticle compositions containing one or more active agents, especially those useful for treating or preventing or one or more diseases or disorders of the eye, and methods of making and using thereof, are described. The microsphere compositions release an effective amount of the one or more active agents for a period greater than 14 days in vivo, preferably greater than 60 days in vivo, more preferably up to 73 days in vivo, more preferably greater than 90 days in vivo, even more preferably over 100 days in vivo, and most preferably greater than 107 days in vivo. In a preferred embodiment, the microparticle compositions contain one or more active agents useful for managing elevated intraocular pressure (TOP) in the eye. In one embodiment, the microspheres are formed from polylactide-co-glycolide (“PLGA”); in another embodiment, the microspheres are formed from a blend PLGA and poly lactic acid (“PLA”). Relatively hydrophilic, and preferably carboxylated, polymeric materials such as PLGA are used for a drug such as timolol maleate, which is relatively water soluble, to increase drug loading. Higher molecular weight polymers, as well as the ratio of LA (which has a longer degradation time, up to one to two years) to GA (which has a short degradation time, as short as a few days to a week), are used to provide release over a longer period of time. The combination of drug loading and release rate, as well as the minimization of initial burst release, result in prolonged release of a higher amount of drug.

The invention relates to a matrix tablet for the prolonged release of gliclazide which ensures continuous and consistent release of the active ingredient after administration by the oral route, the release being insensitive to variations in the pH of the dissolution medium.

The invention relates to injectable pharmaceutical compositions for the prolonged release of at least one active principle, comprising at least one active principle in an aqueous phase of amphiphilic polymer, said aqueous phase being in the form of a dispersion in a continuous lipid phase. The composition is in the form of a water-in-oil emulsion comprising:

• • a pharmaceutically acceptable, continuous lipid phase,
  • an aqueous disperse phase containing at least one amphiphilic polymer and at least one active principle not covalently bonded to said amphiphilic polymer, and
  • at least one pharmaceutically acceptable surfactant.

In one aspect, the present invention is concerned with a treatment where it is desired that an active agent is designed to be released in a prolonged manner at a time point some time after administration of the active agent. The present invention is particularly suited to administering an agent which may be released whilst a subject is sleeping, shortly before waking and continues to administer the drug during the early waking hours. As well as treating certain conditions by a particular regime, the invention also provides novel formulations for a delayed, followed by a prolonged release of drug.

The invention relates to a new pharmacotherapeutical strategy, to an anti-stress, anti-impairment and anti-aging drug and to a process for its manufacturing. The drug has an etio-pathogenic and homeostatic action, was preclinically tested and clinically checked up in geriatric, neurologic, psychiatric and stress-dependent pathology. The drug achieves a synergistic biological, neurometabolic and cell-trophic composition, being elaborated by the association of the following active principles: a) against oxidative and catabolic stress; methionine with aminoethanol phenoxyacetates and/or aminoethyl phenoxyacetamides; b) against anabolic stress; hydroxopyrimidine carboxylates and/or oxopyrrolidine acetamides with potassium, zinc and lithium; c) vasodilative and normolipidemic; nicotinic, alcohol and/or acid, or its derivatives, with magnesium and iodine; d) energo-active and e) anti-toxic; aspartate; fructose; vitamin B1; vitamin B6; monoacid phosphate and sulfate. The process for manufacturing the drug stipulates; a) pharmaceutical preparation in two complementary types of capsules or coated tablets, gastrosoluble and enterosoluble, the last being enteric coated; b) prolonged-release of vasodilator from the enterosoluble unit.

A tamper-resistant pharmaceutical dosage form comprising a pharmacologically active ingredient embedded in a prolonged release matrix, which comprises a prolonged release matrix material selected from the group consisting of nonionic acrylic polymers and waxy materials and which provides prolonged release of the pharmacologically active ingredient, resistance against solvent extraction, resistance against grinding, and resistance against dose-dumping in aqueous ethanol.