Amphastar Pharmaceuticals Inc is a biopharmaceutical company that focuses on developing, manufacturing, marketing, and selling technically challenging generic and proprietary injectable, inhalation, and intranasal products. Additionally, the company sells insulin API products. The company's finished products are used in hospital or urgent care clinical settings and are contracted and distributed through group purchasing organizations and drug wholesalers. The company has two reportable segments finished pharmaceutical products and API products. Geographically the business presence of the firm is seen in the United States, China and France of which the U.S. accounts for the majority of the revenue.