CHICAGO, IL--(MARKET WIRE)--Jun 9, 2007 -- Endo Pharmaceuticals Inc., a wholly owned subsidiary of Endo Pharmaceuticals Holdings Inc. (NasdaqGS:ENDP - News), has presented results from a Phase III randomized, double-blind, placebo-controlled clinical trial evaluating FROVA (frovatriptan succinate) 2.5 mg tablets as a six-day preventative treatment in women with difficult-to-treat menstrual migraine (MM). The data demonstrated that FROVA significantly reduced the frequency and severity of MM as well as the disabilities related to them. The results, which were presented here today at the annual meeting of the American Headache Society (AHS), were from the second of the two successful Phase III placebo-controlled clinical trials evaluating the efficacy and safety of FROVA in MM prophylaxis.