Eton Pharmaceuticals Inc is a United States based specialty pharmaceutical company. The company is engaged in developing and commercializing pharmaceutical products to fulfill an unmet patient need. It has four commercial rare disease products, Alkindi Sprinkle for the treatment of adrenocortical insufficiency; Carglumic Acid for the treatment of hyperammonemia, Betaine Anhydrous for the treatment of homocystinuria; and Nitisinone for the treatment of hereditary tyrosinemia type 1 (HT-1). The Company has three additional product candidates in late-stage development: ET-400, ET-600, and ZENEO hydrocortisone autoinjector.