BOTHELL, Wash.--(BUSINESS WIRE)--May 4, 2006--ICOS Corporation (Nasdaq:ICOS - News) today released its financial results for the three months ended March 31, 2006 and summarized recent events. “ICOS is off to a strong start in 2006,” stated Paul Clark, ICOS Chairman and CEO. “Cialis continues to gain market share. In March 2006, Cialis captured 25.8% share of U.S. total prescriptions, an increase of 4.0 percentage points of share since March 2005(1). In February 2006, Cialis held 34.0% aggregate market share in Europe, Canada and Mexico, an increase of 4.7 percentage points of share since February 2005(2).”
