| abstract |
The invention relates to piperidine derivatives of formula (I), wherein R1 is a C¿2-4?alkoxy group, R?2¿ is (a); R3 is a hydrogen or halogen atom; R?4 and R5¿ may each independently represent a hydrogen or halogen atom, or a C¿1-4?alkyl, C1-4alkoxy or trifluoromethyl group; and pharmaceutically acceptable derivatives thereof, to processes for their preparation, and their use in the treatment of conditions mediated by tachykinins. |