Virchow Group comprises of six active pharmaceutical ingredient (API) and drug intermediate manufacturing units and two biotech units. Incorporated in 1981, the flagship company of the group, Virchow Laboratories Limited is today the largest producer of Sulfamethoxazole in the world. In fact, Virchow Group services more than 80% of the worldwide Sulfamethoxazole requirement. Other group companies are leading manufacturers of Ranitidine, Cephalosporins and various other APIs and bio-pharmaceuticals.