Patent ID: 6867226

Claim:
A method for treating irritable colon syndrome, which comprises administering to a subject in need of treatment a pharmaceutically effective amount of a pharmaceutical composition which comprises, as its active ingredient, the compound represented by formula (2): wherein R 1 to R 4 are the same or different from one another and each represents a hydrogen atom, a halogen atom, a substituted or unsubstituted lower alkyl group, a substituted or unsubstituted lower alkenyl group or a substituted or unsubstituted amino group, or two groups of R 1 and R 2 are linked together to form a benzene ring and R 3 and R 4 are hydrogen atoms, with the proviso that compounds in which all of R 1 to R 4 are hydrogen atoms are excluded; R 5 represents a hydrogen atom; and m is an integer of 3, in which said lower alkyl group means a straight or branched C 1 -C 4 alkyl group, said lower alkenyl group means a straight or branched C 2 -C 4 alkenyl group, the substituent for said lower alkyl or lower alkenyl group is selected from the group consisting of a halogen atom, a hydroxyl group, a carbamoyl group, an amino group and a cyano group, the substituent for said amino group is selected from the group consisting of a straight or branched C 1 -C 4 alkyl group, a straight or branched C 1 -C 4 alkycarbonyl group, a straight or branched C 2 -C 4 alkenyl group and a benzylidene group which may have a phenyl group, and said halogen atom is selected from the group consisting of fluorine, chlorine, bromine and iodine atoms, and which further comprise a pharmaceutically acceptable carrier.