About Us


Amphastar Pharmaceuticals, Inc., headquartered in Rancho Cucamonga, California, established in 1996, is a recognized specialty pharmaceutical company that uses state-of-the-art, cGMP compliant facilities to develop, manufacture, and market injectable and inhalation products.


In addition to the Corporate Headquarters, Amphastar has five manufacturing facilities located in the United States, China and Europe along with a state-of-the-art New Drug Research Center.


Amphastar and its subsidiaries each have their own distinct focus that they skillfully bring together to meet the varied needs of the pharmaceutical industry.


We currently produce approximately 15 injectable products while we continue to develop a portfolio of generic and branded products that target large markets with high technical barriers to entry.  Amphastar’s long-standing relationship with the major group purchasing organizations and drug wholesalers in the U.S. enables it to  establish significant market share upon the introduction of its new products.



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