Extended release pharmaceutical formulations
First Claim
Patent Images
1. An extended release pharmaceutical formulation for oral administration, which comprises:
- a pharmaceutical formulation which is adapted to approach zero order release of drug over a 12 to at least a 24 hour period, which formulation is comprised of a mixture of a) about 0% to about 50% of an immediate release particle containing a core comprising a therapeutically effective amount of at least one water-soluble or water-insoluble drug, about 15% to about 40% by weight inert spherical substrate particles, and about 0.5% to about 4% by weight binder, coated with about 4% to about 20% by weight talc and having a particle size of -10+60 mesh size, U.S. Standard sieve size, and b) up to 100% of an extended release particle comprising about 65% to about 95% by weight of the immediate release particle of a) additionally coated with about 5.0% to about 35% by weight of a dissolution modifying system comprising a film forming agent and plasticizer, wherein the extended release particle has a particle size of -10+60 mesh size, U.S. Standard sieve mesh size, and wherein all percentages are based on the total weight of the pharmaceutical formulation.
8 Assignments
0 Petitions
Accused Products
Abstract
An extended release pharmaceutical formulation adapted to approach zero order release of drug over a 12 to at least 24 hour period, comprised of a mixture of 0 to aobut 50% of an immediate release particle containing a drug, inert substrate and binder, coated with talc and up to 100% of an extended release particle comprising the immediate release particle coated with a dissolution modifying system containing plasticizers and a film forming agent.
643 Citations
29 Claims
-
1. An extended release pharmaceutical formulation for oral administration, which comprises:
- a pharmaceutical formulation which is adapted to approach zero order release of drug over a 12 to at least a 24 hour period, which formulation is comprised of a mixture of a) about 0% to about 50% of an immediate release particle containing a core comprising a therapeutically effective amount of at least one water-soluble or water-insoluble drug, about 15% to about 40% by weight inert spherical substrate particles, and about 0.5% to about 4% by weight binder, coated with about 4% to about 20% by weight talc and having a particle size of -10+60 mesh size, U.S. Standard sieve size, and b) up to 100% of an extended release particle comprising about 65% to about 95% by weight of the immediate release particle of a) additionally coated with about 5.0% to about 35% by weight of a dissolution modifying system comprising a film forming agent and plasticizer, wherein the extended release particle has a particle size of -10+60 mesh size, U.S. Standard sieve mesh size, and wherein all percentages are based on the total weight of the pharmaceutical formulation.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 13, 14, 15, 16, 17, 18, 19, 20, 22, 23, 24, 25, 26, 27, 28, 29)
-
11. The extended release pharmaceutical formulation for oral administration, which comprises:
- a pharmaceutical formulation which is adapted to release a drug over a 12 to at least a 24 hour period, which formulation is comprised of a mixture of a) about 0% to about 50% of an immediate release particle containing a core comprising a therapeutically effective amount of at least one water-soluble or water-insoluble drug, about 15% to about 40% by weight inert spherical substrate particles, and about 0.5% to about 5% by weight binder, coated with about 4% to about 20% by weight talc and having a particle size of -10+60 mesh size, U.S. Standard sieve size, and b) up to 100% of an extended release particle comprising about 65% to about 95% by weight of the immediate release particle of a) additionally coated with about 5.0% to about 35% by weight of a dissolution modifying system comprising a film forming agent and plasticizer, wherein the extended release particle has a particle size of -10+60 mesh size, U.S. Standard sieve mesh size, and wherein all percentages are based on the total weight of the pharmaceutical formulation.
-
21. An extended release pharmaceutical formation for oral administration which comprises:
- a pharmaceutical formulation which is adapted to approach zero order release of drug over a 12 to at least 24 hour period, which formulation is comprised of a mixture of;
a) 0 to about 50% of an immediate release particle containing about 15 to about 40% by weight inert spherical substrate particle about 0.5 to about 4% binder and about 4 to about 85% of at least one drug and a coating comprising about 4 to about 20% talc; and b) up to 100% of an extended release particle comprising an immediate release particle of a) coated with a dissolution modifying system comprising about 0.5 to about 25% film forming agent, about 0.01 to about 5% plasticizer and up to 25% modifying agent, all percents herein are by weight of the final product.
- a pharmaceutical formulation which is adapted to approach zero order release of drug over a 12 to at least 24 hour period, which formulation is comprised of a mixture of;
Specification