Amphastar Pharmaceuticals, Inc., a specialty pharmaceutical company, develops, manufactures, markets, and sells generic and proprietary injectable, inhalation, and intranasal products in the United States, China, and France. The company operates through two segments, Finished Pharmaceutical Products and API. It offers enoxaparin, a low molecular weight heparin to prevent and treat deep vein thrombosis; naloxone for opioid overdose; Primatene Mist, an over-the-counter epinephrine inhalation product for the temporary relief of mild symptoms of intermittent asthma; and Cortrosyn, a lyophilized powder use as a diagnostic agent in the screening of patients with adrenocortical insufficiency. The company also provides Amphadase, a bovine-sourced hyaluronidase injection to absorb and disperse other injected drugs; lidocaine jelly, a local anesthetic product for urological procedures; lidocaine topical solution for various procedures; phytonadione injection for newborn babies; atropine, calcium