598291 Disclosed herein is a pharmaceutical composition comprising: a compound represented by formula (I),and an alkali earth metal caronate. The pharmaceutical composition has excellent dissolvability, is stable even after long-term storage, and is useful as a prophylactic/therapeutic agent for tumors. (In the formula, R1 represents a hydrogen atom, a C1-6 alkyl group or a C3-8 cycloalkyl group and R2 represents a hydrogen atom or a methoxy group.) Specifically wherein the compound represent by the formula (I) is 4-(3-chloro-4- (cyclopropylaminocarbonyl)aminophenoxy)-7-methoxy-6-quinolinecarboxamide methanesulfonate.
