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Direct compression polymer tablet core

a technology of polymer and tablet core, applied in the field of polymer materials, can solve the problems of undesirable addition of any material other than the active ingredient, not all therapeutics, and generally inability to achiev

Inactive Publication Date: 2006-02-16
TYLER JOSEPH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

"The present invention provides a tablet core made of at least 95% of an aliphatic amine polymer, preferably a cross-linked polyallylamine resin that is hydrated with water. The tablet core can also contain other excipients. The invention also provides a method of making the tablet core by compressing the aliphatic amine polymer to form the tablet core. The invention also relates to a coated tablet with a water-based coating. The technical effects of this invention include improved tablet properties, such as faster dissolution and better absorption, as well as improved tablet stability and reduced tablet wear and tear."

Problems solved by technology

Non-absorbed polymer therapeutics have traditionally presented a number of formulation challenges as the dosages are generally very large (gram quantities), and the resins tend to be extremely hydrophilic.
However, not all therapeutics, particularly given the high dose requirements of polymeric ion exchange therapeutics, lend themselves to a tablet formulation.
Even if such materials could be rendered into a tablet, it is generally not possible without the significant addition of other materials which assist in the tableting process.
Ultimately the addition of any materials other than the active ingredient is undesirable given the dose requirement of the active ingredient.
It has been discovered that the core polymeric material tends to be very hygroscopic, and thus will swell immediately upon contact with the inside of the mouth.
Most coatings contain water, and thus it was believed that coating such tablets with a water-based coating would be impossible because the hygroscopic tablets would swell during the coating process.
Thus providing a tablet core comprising a hygroscopic material such that a suitable coating may be used in conjunction with that core, is another significant challenge to providing the polymeric active ingredient in tablet form.

Method used

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  • Direct compression polymer tablet core
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Examples

Experimental program
Comparison scheme
Effect test

example 1

Preparation and Characterization of 400 mg and 800 mg Sevelamer Hydrochloride Direct Compression Tablet Cores

Preparation of Tablet Cores

[0023] 400 mg sevelamer hydrochloride tablet cores were prepared from a blend consisting of 5000.0 g sevelamer hydrochloride, 50.0 g colloidal silicon dioxide, NF (Aerosil 200) and 50.0 g stearic acid. The sevelamer hydrochloride was hydrated to moisture content of 6% by weight. The blend was prepared by passing the sevelamer hydrochloride and colloidal silicon dioxide through a #20 mesh screen, transferring the mixture to a 16 quart PK blender and blending for five minutes. The stearic acid was then passed through an oscillator equipped with a #30 mesh screen, transferred into the 16 quart PK blender and blended for five minutes with the sevelamer hydrochloride / colloidal silicon dioxide mixture. The resulting blend was discharged into a drum and weighed. The final blend was then compressed on a 16 station Manesty B3B at 4 tons pressure using 0.2...

example 2

Coating of Sevelamer Hydrochloride Tablet Cores

[0026] Compressed core tablets prepared as described in Example 1 were coated in a coating pan with an aqueous coating solution having a solids composition comprising:

Material% W / WHPMC low viscosity Type 2910, cUSP38.5%HPMCE high viscosity Type 2910, cUSP38.5%diacetylated monoglyceride23.0%

[0027] The coating solution was applied to the compressed cores until a weight gain of approximately 4 to 6% was achieved. Stability studies—controlled room temperature, accelerated conditions, freeze / thaw and photosensitivity—for the coated sevelamer hydrochloride tablets were conducted in accordance with those procedures known in the art and described in the following references: International Committee on Harmonization (ICH) guidance “Q1A-Stability Testing of New Drug Substances and Products” (June 1997); ICH “Q1B-Guidelines for the Photostability Testing of New Drug Substances and Products” (November 1996); and ICH guidance “Q1C-Stability Testi...

example 3

Factors Affecting the Processing and Performance Characteristics of Compressed Tablets (Prior to Coating)

[0028] In order to maintain consistently acceptable compressed tablet on a per batch basis, a number of correlative tests were performed in order to determine which factors most strongly impact the quality and integrity of the tablets. Studies such as weight variation, tablet hardness, friability, thickness, disintegration time, among others are known to those skilled in the art and are described in the United States Pharmacopeia (U.S.P.). “Hardness” means the measure of the force (measured herein in Newtons) needed to fracture a tablet when such tablet is placed lengthwise on a Hardness Tester. “Friability” is the measure of the mechanical strength of the tablet needed to withstand the rolling action of a coating pan and packaging. It is measured using a friabiliator. “Thickness” is the measure of the height of the tablet using a micrometer. “Disintegration Time” is the time ne...

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Abstract

The present invention provides a tablet core which comprises at least about 95% by weight of an aliphatic amine polymer. The invention also provides a method of producing a tablet core comprising at least about 95% by weight of an aliphatic amine polymer resin The method comprises the step of compressing the aliphatic amine polymer to form the tablet core. The tablet core can further include one or more excipients. In this embodiment, the method of producing the tablet core comprises the steps of: (1) hydrating the aliphatic amine polymer to the desired moisture level; (2) blending the aliphatic amine polymer with the excipients in amounts such that the polymer comprises at least about 95% by weight of the resulting blend; and (3) compressing the blend to form the tablet core. The present invention further relates to a coated tablet comprising an aliphatic amine polymer core wherein the coating is a water based coating.

Description

RELATED APPLICATIONS [0001] This application is a continuation of U.S. application Ser. No. 09 / 691,429, filed Oct. 18, 2000, which claims the benefit of U.S. Provisional Application No. 60 / 160,258, filed Oct. 19, 1999, and U.S. Provisional Application No. 60 / 174,227, filed Jan. 3, 2000. The entire teachings of the above applications are incorporated herein by reference.BACKGROUND OF THE INVENTION [0002] A number of polymeric materials having useful therapeutic activity have been described for treatment of various conditions such as hyperlipidemia and hyperphosphatemia. Many of these polymeric materials function as non-absorbed ion exchange resins in the digestive tract. Such non-absorbed polymeric materials bind or otherwise sequester a target molecule and facilitate its removal from the body via the gastrointestinal tract. Examples of such resins include: Colestipol and Cholestyramine useful as orally administered cholesterol lowering agents; a variety of aliphatic amine polymers d...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): A61K9/20A61K9/28A61K31/785
CPCA61K9/2009A61K9/2013A61K9/2027A61K9/28A61K9/2866A61K31/785A61K9/282
Inventor TYLER, JOSEPHPETERSEN, JOHN S.
Owner TYLER JOSEPH
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