Polymeric compositions and dosage forms comprising the same
First Claim
1. A composition comprising, based upon the total wet weight of the composition:
- a) from about 5 percent to about 50 percent of a water insoluble, film forming polymer;
b) from about 0.05 percent to about 15 percent of a gelling agent; and
c) from about 40 percent to about 95 percent of a multisolvent system, wherein the multisolvent system is comprised of, based upon the total weight of the multisolvent system, from about 10 percent to about 50 percent of water and from about 50 percent to about 90 percent of a water miscible organic solvent.
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Accused Products
Abstract
A dosage form comprises: (a) at least one active ingredient; (b) a core having an outer surface; and (c) a shell which resides upon at least a portion of the core outer surface, wherein at least a portion of the shell is semipermeable, such that the liquid medium diffuses through the semipermeable shell or shell portion to the core due to osmosis. The shell also provides for delivery of the active ingredient to a liquid medium outside the shell after contacting of the dosage form with the liquid medium. The dosage form delivers one or more active ingredients in a controlled manner upon contacting of the dosage form with a liquid medium. The dosage form may be employed to provide a burst release of the active ingredient, or to provide release of the active ingredient at an ascending release rate over an extended time period upon contacting of the dosage form with a liquid medium. At least a portion of the shell may be comprised of a polymeric composition containing film former, gelling agents, which can be dissolved in a multisolvent system comprised of water and an organic solvent.
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Citations
25 Claims
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1. A composition comprising, based upon the total wet weight of the composition:
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a) from about 5 percent to about 50 percent of a water insoluble, film forming polymer;
b) from about 0.05 percent to about 15 percent of a gelling agent; and
c) from about 40 percent to about 95 percent of a multisolvent system, wherein the multisolvent system is comprised of, based upon the total weight of the multisolvent system, from about 10 percent to about 50 percent of water and from about 50 percent to about 90 percent of a water miscible organic solvent. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A composition comprising, based upon the total wet weight of the composition:
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a) from about 10 percent to about 40 percent of a water insoluble, film forming polymer, wherein the water insoluble, film forming polymer is cellulose acetate and/or ethyl cellulose;
b) from about 0.5 percent to about 5 percent of a carrageenan gelling agent; and
c) from about 55 percent to about 89.5 percent of a multisolvent system, wherein the multisolvent system is comprised of, based upon the total weight of the multisolvent system, from about 10 percent to about 30 percent of water and from about 70 percent to about 90 percent of acetone. - View Dependent Claims (17)
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18. A method of preparing a composition comprised of:
a) adding at least one gelling agent to a mixture comprised of a water insoluble film forming polymer and a multisolvent system at a temperature above the gelation temperature of the at least one gelling agent, said multisolvent system comprised of water and an organic solvent. - View Dependent Claims (19, 20, 21)
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22. A method of preparing a composition comprised of:
a) combining a first premixture of at least one organic solvent and at least one water insoluble film forming polymer with a second premixture of water and at least one gelling agent under temperature conditions above the gelation temperature of the at least one gelling agent. - View Dependent Claims (23, 24, 25)
Specification