Patent ID: RE40259

Claim:
A method of treating acute or chronic pain in a patient in need thereof, said method comprising administering to the a patient in need of such treatment a medicament comprising an analgesically effective amount of an analgesic which is an alpha-aminoamide compound of formula (I) wherein: A is a —(CH 2 ) m —, —(CH 2 ) n —X— or —(CH 2 ) v —O— group wherein m is an integer of 1 to 4, n is zero or an integer of 1 to 4, X is —S— or —NH—, and v is zero or an integer of 1 to 5; s is 1 or 2; R is a ring or a phenyl ring optionally substituted by one or two substituents independently chosen selected from halogen, cyano, C 1 -C 4 alkyl, C 1 -C 4 alkoxy and trifluoromethyl; R 1 is hydrogen or C 1 -C 4 alkyl; one of R 2 and R 3 is hydrogen and the other is hydrogen or C 1 -C 4 alkyl optionally substituted by hydroxy or phenyl; or R 2 and R 3 taken together with the carbon atom to which they are linked form a C 3 -C 6 cycloalkyl ring; or R 2 and R 3 are both methyl; R 4 is hydrogen or C 1 -C 4 alkyl; or a pharmaceutically acceptable salt thereof; with the proviso that , when A is a —(CH 2 ) 5 —O— group then s is 1, R is a phenyl group optionally substituted by one or two substituents selected independently from halogen, trifluoromethyl and C 1 -C 4 alkoxy, R 1 is hydrogen and one of R 2 and R 3 is hydrogen and the other is hydrogen or C 1 -C 4 alkyl optionally substituted by hydroxy.