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Sustained release capsule or tablet formulation comprising a pharmaceutically acceptable dihydropyridine

  • US 5,015,479 A
  • Filed: 09/30/1988
  • Issued: 05/14/1991
  • Est. Priority Date: 02/02/1987
  • Status: Expired due to Term
First Claim
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1. A sustained release capsule or tablet formulation suitable for once daily administration comprising an adsorbate of a mixture of 1 part by weight of a pharmaceutically acceptable substantially amorphous dihydropyridine and from 0.1 to 10 parts by weight of a polyvinylpyrrolidone having an average molecular weight of at least 55,000 and having a viscosity which serves to sustain the release of active ingredients, the mixture being adsorbed on a cross-linked polyvinylpyrrolidone in a ratio of 1 part by weight of said mixture to 0.5 to 20 parts by weight of cross-linked polyvinylpyrrolidone, blended with a polymeric material which gels in the presence of water, wherein said polymeric material is selected from the group consisting of a pharmaceutically acceptable water-soluble polymer, a pharmaceutically acceptable water-insoluble polymer or mixtures of said polymers, the amount and ratio of said water-soluble polymer to said water-insoluble polymer being effective in combination with the viscosity of the polyvinylpyrrolidone to produce the desired sustained release effect.

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