King Pharmaceuticals, the world's 39th largest pharmaceutical company, is based in Bristol, Tennessee. King produces a wide range of pharmaceuticals, including Altace for heart attack prevention, Levoxyl for hypothyroidism, Sonata, a sleeping aid, and Skelaxin, a muscle relaxant. King Pharmaceuticals currently operates manufacturing facilities in Bristol, Tennessee, Rochester, Michigan, St. Louis, Missouri, St. Petersburg, Florida, and Middleton, Wisconsin, and they employ approximately 2700 people including a sales force of over 1000 individuals. - Source: Wikipedia