| abstract |
Compounds of formulas (I) and (II) are disclosed wherein 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) compound. vinylpiperazine and methods for treating or preventing pain and other conditions in an animal, including administering to an animal in need thereof, an effective amount of a Nitro (cyano) vinylpiperazine compound. |