Tenax is a pharmaceutical company that focuses on identifying, developing, and commercializing products for cardiovascular and pulmonary diseases in the United States and Canada. Tenax focuses on the development and commercialization of pharmaceutical products containing levosimendan, a 2.5 mg/ml concentrate for solution for infusion/5ml vial for use in the reduction of morbidity and mortality in cardiac surgery patients at risk for developing low cardiac output syndrome. Tenax was founded in 1967 and is based in Chapel Hill, North Carolina.