LEXINGTON, Mass.--(BUSINESS WIRE)--April 19, 2006--Cubist Pharmaceuticals, Inc. (Nasdaq: CBST - News) today reported results for the first quarter ended March 31, 2006. CUBICIN continued to show strong revenue growth with $37.9 million of net product revenues for the first quarter of 2006 (which includes $0.6 million of international product sales), compared to $20.9 million for the first quarter of 2005, a 79% increase year-over-year, excluding international product sales.