Use of certain 5-HT3 receptor antagonists in the treatment of visceral pain

摘要

A method of treatment of visceral pain in mammals, including humans, which method comprises the administration to the mammal in need of such treatment, an effective amount of a compound of formula (I) or a pharmaceutically acceptable salt thereof: X-CO-Y-Z (I) wherein X is a group of formula (a), (b), (c), (d) or (e): wherein Ra to Rd are selected from hydrogen, halogen or hydroxy; R1 is hydrogen and R2 is hydrogen or C1-4 alkyl; or R1 and R2 together are a bond; R3 to R7 are independently hydrogen or C1-6 alkyl; and R4 together with R2 may be C2-7 polymethylene when R1 is hydrogen; either R8 is C1-6 alkoxy; R9 is hydrogen; R10 is amino or C1-7 alkanoylamino; and R11 is halo or C1-6 alkylthio; or R8 is hydrogen; R9 is halo, C1-6 alkoxy or C1-6 alkyl; R10 is hydrogen or C1-6 alkoxy; and R11 is halo, C1-6 alkoxy or C1-6 alkyl; L is CH or N; Y is NH or O, with the proviso that Y is NH when X is (e) and R8 is C1-6 alkoxy; Z is a group of formula (f), (g) or (h): wherein n is 2 or 3; p and q are independently 1 to 3; and R12 or R13 is methyl or ethyl.