Polymeric compositions and dosage forms comprising the same
First Claim
1. A dosage form comprising:
- (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 the shell comprises a first shell portion which is semipermeable to a liquid medium and comprised of, based upon the total dry weight of the shell, from about 40 percent to about 99 percent of a water insoluble film forming polymer and from about 1 percent to about 30 percent of a gelling agent, and a second shell portion which is compositionally different than the first shell portion, the first and second shell portions each are substantially in contact with the core outer surface, and the shell comprises means for providing the active ingredient to a liquid medium outside the shell after contacting of the dosage form with the liquid medium.
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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.
53 Citations
38 Claims
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1. A dosage form comprising:
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(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 the shell comprises a first shell portion which is semipermeable to a liquid medium and comprised of, based upon the total dry weight of the shell, from about 40 percent to about 99 percent of a water insoluble film forming polymer and from about 1 percent to about 30 percent of a gelling agent, and a second shell portion which is compositionally different than the first shell portion, the first and second shell portions each are substantially in contact with the core outer surface, and the shell comprises means for providing the active ingredient to a liquid medium outside the shell after contacting of the dosage form with the liquid medium. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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27. A dosage form comprising:
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(a) at least one active ingredient;
(b) a core having an outer surface, a first core portion, a second core portion, and a third core portion located between the first and second core portions, wherein the third core portion comprises an osmopolymer; and
(c) a shell which resides upon at least a portion of the core outer surface, in which the shell comprises a first shell portion which is semipermeable to a liquid medium and is comprised of, based upon the total dry weight of the shell, from about 40 percent to about 99 percent of a water insoluble film forming polymer and from about 1 percent to about 30 percent of a gelling agent, and a second shell portion which is compositionally different than the first shell portion, the first and second shell portions each are substantially in contact with the core outer surface, and at least one of the first or second shell portions has at least one passageway extending from the surface of the shell portion, through the shell, and to at least the surface of the core. - View Dependent Claims (28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38)
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Specification