Delivery system comprising means for controlling internal pressu

Details Delivery system comprising means for controlling internal pressu Delivery system comprising means for controlling internal pressu

1992-03-12

1993-07-20

Page, Thurman K.

Drug, bio-affecting and body treating compositions

Preparations characterized by special physical form

Tablets, lozenges, or pills

424438, 6048921, A61K 924

Patent

active

052291332

ABSTRACT:
A dispensing device is disclosed for delivering a beneficial agent. The device comprises (1) a semipermeable housing defining a internal space, (2) an optional and presently preferred in the space, (3) a heat responsive composition comprising a beneficial agent in the space, (4) a space consuming member in the device, (5) a non-toxic compound blended with the heat responsive composition for enhancing its viscosity; (6) an exit port in the wall for increasing the internal pressure of the dispenser and for simultaneously letting the beneficial agent exit through said port from the device, and (7) an embodiment comprising a prehydrating fluid for fastening the start-up of delivery from the delivery system.

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