Focused on Delivering High Quality Products and Service

On May 7, 2018, Impax Laboratories, Inc. combined with Amneal Pharmaceuticals, Inc. (NYSE:AMRX) to create a dynamic company powered by a robust U.S. generics business and growing branded franchise. Today, we are working to integrate our business into the new Amneal and are excited about our future as one company.

In the meantime, there is no change to how you report Adverse Events or Product Complaints, or seek Medical Inquiries.

To report Adverse Events or Product Complaints, or for Medical Inquiries:

Phone: (877) 99-Impax (46729), option 2
Phone: (510) 240-6450, option 2
Impax Laboratories
31047 Genstar Road
Hayward, CA 94544
Attention: Medical Affairs

Follow link below for the Impax Adverse Event and Product Complaint Report Form:

You are encouraged to report negative side effects of prescription drugs to the FDA. Visit, or call (800) FDA-1088.

For Customer Service related questions (product orders, delivery, billing, account, etc.)

Phone: (877) 99-Impax (46729), option 3
Fax Customer Service Department: (215) 558-4353 (for orders), (215) 558-4418 (for returns)
Email Customer Service Department: