Patent ID: 8445539

Claim:
A method of treating schizophrenia or a schizophrenia related disorder, comprising administering to a patient in need thereof a therapeutically effective dose of a compound of formula (I) or its single optical isomers or mixtures thereof or pharmaceutically acceptable salts of its single optical isomers or mixtures thereof, wherein: n is 1 or 2; R is meta or para to the alpha-aminoamide substituent and is a C 3 -C 6 alkyl or benzyloxy, wherein the phenyl radical of the benzyloxy group is optionally substituted with fluoro or chloro; R 1 is hydrogen, methyl, chloro or fluoro; R 2 is hydrogen or C 1 -C 3 alkyl; R 3 is hydrogen or C 1 -C 4 alkyl optionally substituted by hydroxy or methoxy; R 4 and R 5 are, independently, hydrogen or C 1 -C 4 alkyl.