Opioid polymer release system
First Claim
Patent Images
1. A controlled release pharmaceutical formulation for oral delivery of hydrocodone or oxycodone consisting of a single injection molded matrix having a coating, wherein:
- the single injection molded matrix has a cylindrical shape and comprises a therapeutically effective amount of hydrocodone or oxycodone or a pharmaceutically acceptable salt thereof and one or more polyethylene oxides, wherein the average molecular weight of the one or more polyethylene oxides present in the matrix is from about 200,000 to about 300,000 daltons; and
the coating on the matrix has at least one opening exposing an end surface of the matrix to permit release of the hydrocodone or oxycodone from the matrix by erosion of the matrix, and is insoluble and impermeable to body fluids during the intended hydrocodone or oxycodone release period;
wherein the coating and the matrix are formed by injection molding,wherein the formulation exhibits zero order release of at least 60% of the hydrocodone or oxycodone from the formulation when subject to an in vitro dissolution test according to USP 24, NF 19, 711 Dissolution, employing Apparatus 2 equipped with a paddle using 1000 mL of 0.1 N hydrochloric acid dissolution medium and a paddle rotation of 120 rpm for the first 120 minutes, and a buffer solution having a pH of 6.8 and a paddle rotation of 50 rpm thereafter.
5 Assignments
0 Petitions
Accused Products
Abstract
A pharmaceutical composition for controlled release of an active substance is provided. The active substance is released into an aqueous medium by erosion of at least one surface of the composition. The composition comprises i) a matrix comprising a) polymer or a mixture of polymers, b) an active substance and, optionally, c) one or more pharmaceutically acceptable excipients, and ii) a coating.
351 Citations
20 Claims
-
1. A controlled release pharmaceutical formulation for oral delivery of hydrocodone or oxycodone consisting of a single injection molded matrix having a coating, wherein:
-
the single injection molded matrix has a cylindrical shape and comprises a therapeutically effective amount of hydrocodone or oxycodone or a pharmaceutically acceptable salt thereof and one or more polyethylene oxides, wherein the average molecular weight of the one or more polyethylene oxides present in the matrix is from about 200,000 to about 300,000 daltons; and the coating on the matrix has at least one opening exposing an end surface of the matrix to permit release of the hydrocodone or oxycodone from the matrix by erosion of the matrix, and is insoluble and impermeable to body fluids during the intended hydrocodone or oxycodone release period; wherein the coating and the matrix are formed by injection molding, wherein the formulation exhibits zero order release of at least 60% of the hydrocodone or oxycodone from the formulation when subject to an in vitro dissolution test according to USP 24, NF 19, 711 Dissolution, employing Apparatus 2 equipped with a paddle using 1000 mL of 0.1 N hydrochloric acid dissolution medium and a paddle rotation of 120 rpm for the first 120 minutes, and a buffer solution having a pH of 6.8 and a paddle rotation of 50 rpm thereafter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
-
Specification