Patent ID: 7087643

Claim:
A method for treating neuropathic pain and cluster headache-associated pain comprising administering to a subject in need thereof a therapeutically effective amount of a compound of Formula (I): wherein phenyl is substituted at X with one to five halogen atoms independently selected from the group consisting of fluorine, chlorine, bromine and iodine; and, R 1 , R 2 , R 3 and R 4 are independently selected from the group consisting of hydrogen and C 1 –C 4 alkyl; wherein C 1 –C 4 alkyl is optionally substituted with phenyl (wherein phenyl is optionally substituted with substituents independently selected from the group consisting of halogen, C 1 –C 4 alkyl, C 1 –C 4 alkoxy, amino, nitro and cyano).