abstract |
Compounds of formulae (I) and (II) where Ar1, Ar2, R3, R4, and m, are disclosed herein, or a pharmaceutically acceptable salt thereof (a 'Nitro(cyano)vinylpiperazine Compound'); compositions comprising an effective amount of a Nitro(cyano)vinylpiperazine Compound; and methods for treating or preventing pain and other conditions in an animal comprising administering to an animal in need thereof an effective amount of a Nitro(cyano)vinylpiperazine Compound are disclosed. |