Generated: December 15, 2017
DrugPatentWatch Database Preview
Details for Patent: 4,721,619
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Summary for Patent: 4,721,619
|Title:|| Controlled absorption diltiazen pharmaceutical formulation|
|Abstract:||A controlled absorption diltiazem formulation for oral administration comprises a pellet having a core of diltiazem or a pharmaceutically acceptable salt thereof in association with an organic acid and a lubricant, and an outer membrane which permits release of diltiazem in an aqueous medium at a controlled rate which is substantially pH independent. The pellet has a dissolution rate in vitro, which when measured according to the Paddle Method of U.S. Pharmacopoeia XX, is not more than 10% of the total diltiazem after 2 hours of measurement in a buffered medium. Not more than 30% of the total diltiazem is released after a total of 4 hours measurement and not more than 40% of the total diltiazem is released after a total of 6 hours. 100% release is achieved after 12 hours, with a maximum of 80% of the total diltiazem being released after 8 hours.|
|Inventor(s):|| Panoz; Donald E. (Whale Bay, BM), Geoghegan; Edward J. (Athlone, IE) |
|Assignee:|| Elan Corporation p.l.c. (IE) |
Patent Claim Types:|
see list of patent claims
|Composition; Formulation; Compound; Dosage form; |
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Foreign Priority and PCT Information for Patent: 4,721,619
|Foriegn Application Priority Data|
||Foreign Patent Number
||Foreign Patent Date
|Ireland||3057/83||Dec 22, 1983|
International Patent Family for Patent: 4,721,619
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