EP0425154A1 — Sustained release elements
Assigned to Dow Silicones Belgium SPRL · Expires 1991-05-02 · 35y expired
What this patent protects
The invention is concerned with a sustained release element and its manufacture. The element comprises an agent (A) capable of release from the element when the latter is in an aqueous environment and a vehicle (B) therefor, the vehicle (B) comprising a hydrophilic componen…
USPTO Abstract
The invention is concerned with a sustained release element and its manufacture. The element comprises an agent (A) capable of release from the element when the latter is in an aqueous environment and a vehicle (B) therefor, the vehicle (B) comprising a hydrophilic component such as propylene glycol, liquid polyethylene glycols or glycerol, a silicone polymer and a modulating component, such as a polyhydroxylated organic substance or a hydrophilic polymer which swells in an aqueous medium, such as a cellusolve derivative. This element is useful particularly for affording controlled release of therapeutic or diagnostic agents. In addition to controlled release, swelling properties, adhesion and/or floatability enable increased residence times to be achieved in the stomach, colon or on the mucosa of patients undergoing treatment.
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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