Amphastar Pharmaceuticals, Inc. revenue for the last year amounted to 731.97 M USD, the most of which — 731.97 M USD — came from its highest performing source at the moment, Pharmaceutical Products. The greatest contribution to the revenue figure was made by United States — last year it brought Amphastar Pharmaceuticals, Inc. 707.68 M USD, and the year before that — 635.19 M USD.