CHADDS FORD, PA--(Marketwire - April 24, 2008) - Endo Pharmaceuticals Holdings Inc. (NASDAQ: ENDP), a market leader in pain management, will announce its financial results for the first quarter ended March 31, 2008 before the market opens on April 30, 2008, and will hold a conference call at 11:00 a.m. ET that day to discuss these results.