Contact Us

For general inquiries, please contact our Global Headquarters at 1-475-230-2596.

To report an adverse event experience for any Alexion product, please contact us at or 1-844-259-6783.

To report an issue or complaint with an Alexion product, please contact us at

To report a compliance or ethics concern, please visit

For SOLIRIS, STRENSIQ, KANUMA, or ULTOMIRIS order inquires, customer operations, case management, medical information, product complaints, or to inquire about the SOLIRIS REMS program or ULTOMIRIS REMS program, please call 1-888-765-4747

For information on SOLIRIS, ULTOMIRIS, or KANUMA returns in the U.S., please review our full Return Goods Policy here