EP0171528A2
Expired / Lapsed
EP
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Controlled release pharmaceutical preparations
Assignee: Pennwalt Corp
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Filing: 1985-05-30
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Granted: —
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Expires: 2005-05-30
Abstract
Abstract Controlled release pharmaceutical preparations containing coated ion exchange resin drug complex particles, the resin particles having been treated, prior to coating, with about 15 to 25% by weight of glycerin, based on the combined weight of the glycerin and the drug resin complex particles.
Inventors
- 👤 Yegnaswami Raghunathan
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-29 01:56
CPC Classifications
A; A61; A61K; A61K9/00; A61K9/14; A61K9/48; A61K9/50; A61K9/5005; A61K9/5021; A61K9/5036; A61K9/5042; A61K9/5047; A61K47/00; A61K47/50; A61K47/51; A61K47/56; A61K47/58; A61K47/585; A61K9/16; A61K9/1605; A61K9/1617; A61K9/1629; A61K9/1635
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
58 words
A pharmaceutical preparation comprising ion exchange resin particles having a pharmacologically active drug adsorbed thereon to form drug-resin complex particles, which resin particles have been treated with from about 15 to about 25 percent by weight of glycerin, based on the combined weight of the glycerin and the complex particles, and subsequently coated with a water-permeable diffusion barrier.
Claim 2
Dependent Claim
58 words
A pharmaceutical preparation comprising ion exchange resin particles having a pharmacologically active drug adsorbed thereon to form drug-resin complex particles, which resin particles have been treated with from about 15 to about 25 percent by weight of glycerin, based on the combined weight of the glycerin and the complex particles, and subsequently coated with a water-permeable diffusion barrier.
Claim 3
Dependent Claim
26 words
A pharmaceutical preparation as in Claim 1 wherein the resin particles have been treated with from about 17.5 to about 25 percent by weight of glycerin.
Claim 4
Dependent Claim
12 words
A pharmaceutical preparation as in Claim 2 wherein the drug is phenylpropanolamine.
Claim 5
Dependent Claim
22 words
A pharmaceutical preparation as in Claim 2 wherein the coating is comprised of ethyl cellulose. . Claims for the Contracting State AT
Claim 6
Dependent Claim
72 words
A process for preparing a pharmaceutical preparation in which a pharmaceutically active drug is adsorbed on particles of an ion exchange resin to form drug-resin complex particles, and the complex particles are provided with a water-permeable diffusion barrier coating, characterized by treating the resin particles, prior to coating, with from about 15 to about 25 percent by weight of glycerin, based on the combined weight of the clycerin and the complex particles.
Claim 7
Dependent Claim
72 words
A process for preparing a pharmaceutical preparation in which a pharmaceutically active drug is adsorbed on particles of an ion exchange resin to form drug-resin complex particles, and the complex particles are provided with a water-permeable diffusion barrier coating, characterized by treating the resin particles, prior to coating, with from about 15 to about 25 percent by weight of glycerin, based on the combined weight of the clycerin and the complex particles.
Claim 8
Dependent Claim
24 words
The process of claim 1 wherein the resin particles have been treated with from about 17.5 to about 25 percent by weight of glycerin.
Claim 9
Dependent Claim
11 words
The process as in claim 2 wherein the drug is phenylpropanolamine.
Claim 10
Dependent Claim
14 words
The process as in claim 2 wherein the coating is comprised of ethyl cellulose.
References Cited (Backward Citations)
No citation records indexed.
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