Controlled release pharmaceutical tablet having lenticular form

Details Controlled release pharmaceutical tablet having lenticular form Controlled release pharmaceutical tablet having lenticular form

1994-11-30

1997-05-06

Page, Thurman K.

Drug, bio-affecting and body treating compositions

Preparations characterized by special physical form

Tablets, lozenges, or pills

424467, 424482, A61K 920

Patent

active

056268742

ABSTRACT:
Controlled release pharmaceutical tablet having a lenticular form consisting of three layers of which the central one or core (a) contains the active principle and the two outer layers or barriers (b) and (c) comprise gellable and/or erodible polymeric material, said barrier layers being equal or different among themselves for composition and/or thickness, while the central layer has a limited external annular surface exposed to the dissolution medium, through which the active principle is released.

REFERENCES:
patent: 4839177 (1989-06-01), Colombo et al.
patent: 5283065 (1994-02-01), Doyon et al.
S.H. Yalkowsky. "Techniques of Solubilization".

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