Matrix for sustained, invariant and independent release of active compounds
First Claim
1. Storage stable pharmaceutical formulation comprising at least two pharmaceutically active compounds in a diffusion matrix, characterized in that the matrix is determined with respect to its essential release characteristics by ethylcellulose or an ethylcellulose-based polymer and at least one fatty alcohol and that the active compounds are released from the substantially non-swellable diffusion matrix in a sustained, invariant and independent manner.
2 Assignments
0 Petitions
Accused Products
Abstract
The invention concerns a storage stable pharmaceutical formulation comprising preferably two active compounds in a non-swellable diffusion matrix, whereby the compounds are released from the matrix in a sustained, invariant and, if several compounds are present, independent manner and the matrix is determined with respect to its substantial release characteristics by ethylcellulose and at least one fatty alcohol. The invention also concerns methods for producing such pharmaceutical formulations.
237 Citations
54 Claims
- 1. Storage stable pharmaceutical formulation comprising at least two pharmaceutically active compounds in a diffusion matrix, characterized in that the matrix is determined with respect to its essential release characteristics by ethylcellulose or an ethylcellulose-based polymer and at least one fatty alcohol and that the active compounds are released from the substantially non-swellable diffusion matrix in a sustained, invariant and independent manner.
- 20. Storage stable pharmaceutical formulation comprising at least two active compounds in a sustained release matrix, characterized in that the matrix is a substantially non-swellable diffusion matrix whose release characteristics are determined by amounts of ethylcellulose or an ethylcellulose-based polymer and at least one fatty alcohol as matrix components, and by extrusion or granulation of the matrix materials together with the amount of the active compounds for formulation of an active compound-containing matrix.
- 24. Storage stable pharmaceutical formulation having an effective amount of an opioid agonist and an opioid antagonist in a substantially non-swellable and non-erosive diffusion matrix, whose release characteristics are determined by amounts of ethylcellulose or an ethylcellulose-based polymer and at least one fatty alcohol.
Specification