Polyvinylpyrrolidone for the stabilization of a solid dispersion of the non-crystalline form of rotigotine
DC CAFCFirst Claim
1. A stable solid dispersion comprising a silicone dispersing agent which is a two-part mixture of solution-based silicones and a dispersed phase, said dispersed phase comprising rotigotine free base and polyvinylpyrrolidone, wherein a weight ratio of rotigotine free base to polyvinylpyrrolidone is about 9:
- 4 to about 9;
6.
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Abstract
The present invention relates to a method for stabilizing rotigotine, the method comprising providing a solid dispersion comprising polyvinylpyrrolidone and a non-crystalline form of rotigotine, wherein the weight ratio of rotigotine to polyvinylpyrrolidone is in a range from about 9:3.5 to about 9:6. The present invention also relates to a solid dispersion comprising a dispersing agent and a dispersed phase, said dispersed phase comprising rotigotine and polyvinylpyrrolidone, wherein the weight ratio of rotigotine to polyvinylpyrrolidone is in a range from about 9:3.5 to about 9:6, a pharmaceutical composition comprising such a solid dispersion, in particular a transdermal therapeutic system, as well as a method for the preparation thereof.
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16 Claims
- 1. A stable solid dispersion comprising a silicone dispersing agent which is a two-part mixture of solution-based silicones and a dispersed phase, said dispersed phase comprising rotigotine free base and polyvinylpyrrolidone, wherein a weight ratio of rotigotine free base to polyvinylpyrrolidone is about 9:
Specification