Qualitest Pharmaceuticals was acquired by Endo in December 2010. Since 1983, the people of Qualitest have dedicated themselve ... s to researching, manufacturing and delivering affordable, high-quality generic pharmaceuticals. Headquartered in Huntsville, Alabama, the company is now ranked in the industry top ten. With manufacturing facilities in Charlotte, North Carolina and Huntsville, Alabama the company has a portfolio exceeding 700 products. read more