EP0148811A1 — Pharmaceutical composition
Assigned to Lejus Medical AB · Expires 1985-07-17 · 41y expired
What this patent protects
The present invention relates to a new oral pharmaceutical composition having an improved release of therapeutically active compound present, in the lower part of the gastro-intestinal duct having a pH exceeding 4.5, whereby the composition comprises a core comprising a therapeut…
USPTO Abstract
The present invention relates to a new oral pharmaceutical composition having an improved release of therapeutically active compound present, in the lower part of the gastro-intestinal duct having a pH exceeding 4.5, whereby the composition comprises a core comprising a therapeutically active compound in the form of a weak base, or a weak acid, on which core there is applied a first, inner layer of a diffusion membrane in the form of ethyl cellulose, and/or a copolymer of polyethyl methacrylate-methyl methacrylate-trimethylammonium ethyl methacrylate chloride, and thereabove a second layer is applied of at least one anionic polymer and/or fatty acid having a pk a of 4.5 to 7. The invention further relates to a process for the preparation of said composition, a pharmaceutical composition containing said composition, and a method for the treatment using such a composition.
Drugs covered by this patent
Bibliographic data sourced from FDA Orange Book + USPTO public records. Plain-English summary generated by AI grounded in source text. Patent term extensions (PTR, SPC, pediatric) may shift the effective expiry. Not legal advice.
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