摘要 |
This invention is directed to a method for preventing or treating neuropathic pain and cluster and migraine headache-associated pain comprising administering to a subject in need thereof a therapeutically effective amount of an enantiomer of Formula (I) substantially free of other enantiomers or an enantiomeric mixture wherein an enantiomer of Formula (I) predominates: 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<SUB>1 </SUB>and R<SUB>2 </SUB>are independently selected from the group consisting of hydrogen and C<SUB>1</SUB>-C<SUB>4 </SUB>alkyl; wherein C<SUB>1</SUB>-C<SUB>4 </SUB>alkyl is optionally substituted with phenyl (wherein phenyl is optionally substituted with substituents independently selected from the group consisting of hydrogen, halogen, C<SUB>1</SUB>-C<SUB>4 </SUB>alkyl, C<SUB>1</SUB>-C<SUB>4 </SUB>alkoxy, amino, nitro and cyano).
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