Patent Number: 6,254,889

Title: Solid dispersion dosage form of amorphous xanthine derivative and enteric-coating polymer

Abstract: The present invention relates to a solid dispersion and a solid dispersion dosage form which comprise a xanthine derivative represented by the following formula (I) or a pharmacologically allowable salt thereof and a polymer. ##STR1## (In the above formula, R.sup.1 and R.sup.2 are the same or different, and represent substituted or unsubstituted lower alkyl groups, and Q represents a hydrogen atom or a hydroxyl group.)

Inventors: Kigoshi; Makoto (Shizuoka, JP), Masada; Tomoaki (Mishima, JP), Ueno; Yasuhiko (Mishima, JP), Ishikawa; Yasuhiro (Shizuoka, JP), Hayakawa; Eiji (Susono, JP)

Assignee: Kyowa Hakko Kogyo Co., Ltd.

International Classification: A61K 9/14 (20060101); C07D 473/04 (20060101); C07D 473/06 (20060101); C07D 473/00 (20060101); A61K 009/10 (); A61K 009/14 (); A61K 009/22 (); A61K 009/52 ()

Expiration Date: 07/03/2018