Capsule construction
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United States of America Patent
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-
Jun 23, 1998
Grant Date -
N/A
app pub date -
Jun 26, 1995
filing date -
Nov 5, 1992
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A controlled release capsule comprises a male plug (2) formed of a water swellable hydrogel which is engaged within a neck portion (4) of a female body (6). The capsule contains a pharmaceutically active material. In contact with an aqueous medium, such as in the gastrointestinal tract, the hydrogel plug swells and becomes disengaged from the body, thereby releasing the active material. In order to facilitate insertion of the male plug into the neck of the body, the body has a flared mouth portion (14) which is wider than the neck. The neck itself may be wider or narrower than the remainder of the body. A water-soluble cap (8) has detentes (18) which clip over the flared mouth portion so as to lock the cap thereto.
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