Merck & Co., Inc., d.b.a. Merck Sharp & Dohme, MSD outside the United States and Canada, is an American pharmaceutical company and is one of the largest pharmaceutical companies in the world.

Merck & Co., Inc., d.b.a. Merck Sharp & Dohme, MSD outside the United States and Canada, is an American pharmaceutical company and is one of the largest pharmaceutical companies in the world.