At Amphastar Pharmaceuticals, we welcome your questions, comments and requests.

To reach our Customer Service department for matters related to our products, please contact

 

Customer Service

1-800-423-4136 (Option 2)

info@amphastar.com

 

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Drug Safety/Medical Information

To report adverse events or product complaints, or for medical information inquiries, please call:

1-800-423-4136 (Option 2)

drugsafety@amphastar.com

 

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General Corporate Inquiry

Amphastar Pharmaceuticals, Inc.

11570 6th Street

Rancho Cucamonga, CA 91730

1-800-423-4136