The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 13, 2003
Filed:
Aug. 01, 2000
Kazuhiro Sako, Shizuoka, JP;
Toyohiro Sawada, Shizuoka, JP;
Keiichi Yoshihara, Shizuoka, JP;
Tatsunobu Yoshioka, Shizuoka, JP;
Shunsuke Watanabe, Shizuoka, JP;
Yamanouchi Pharmaceuticals, Co., Ltd., Tokyo, JP;
Abstract
The present invention is to provide a stable pharmaceutical composition for oral use and preparation thereof in which changes are prevented in drug release at stored even under the exposure to light by adding yellow ferric oxide and/or red ferric oxide in a matrix type sustained-release preparation containing a drug, hydrophilic base, and polyethylene oxide. The present invention is to further provide a method for preventing changes in drug release at stored under the exposure to light in a matrix type sustained-release preparation containing a drug, hydrophilic base, and polyethylene oxide. The quality assurance period of the product can be prolonged and the product value can be improved by the present invention.