Generated: December 13, 2017
DrugPatentWatch Database Preview
Details for Patent: 6,699,503
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Summary for Patent: 6,699,503
|Title:|| Hydrogel-forming sustained-release preparation|
|Abstract:||The invention provides a hydrogen-type sustained-release preparation comprising (1) at least one drug, (2) an additive which insures a penetration of water into the core of the preparation and (3) a hydrogen-forming polymer, wherein said preparation is capable of undergoing substantially complete gelation during its stay in the upper digestive tract such as stomach and small intestine and is capable of releasing the drug in the lower digestive tract including colon. By the preparation of the invention, the drug is efficiently released and absorbed even in the colon so that a steady and sustained release effect can be achieved.|
|Inventor(s):|| Sako; Kazuhiro (Shizuoka, JP), Nakashima; Hiroshi (Shizuoka, JP), Sawada; Toyohiro (Shizuoka, JP), Okada; Akira (Shizuoka, JP), Fukui; Muneo (Shizuoka, JP) |
|Assignee:|| Yamanuchi Pharmaceutical Co., Ltd. (Tokyo, JP) |
Patent Claim Types:|
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Foreign Priority and PCT Information for Patent: 6,699,503
|Foriegn Application Priority Data|
||Foreign Patent Number
||Foreign Patent Date
|Japan||4-274979||Sep 18, 1992|
|Japan||5-165263||Jun 08, 1993|
International Patent Family for Patent: 6,699,503
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