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Customer Service

Product-related Questions and Services by Phone

The Merck National Service Center is currently closed. Normal operating hours are:

Monday–Friday from 8:00 AM–7:00 PM ET
(Hours subject to change for holidays.)

Please try again during normal business hours to speak with a Merck healthcare professional about Merck products or services.

You can also choose one of our other customer service options.

Adverse Event Reporting

If this is an emergency or you wish to report an adverse event with a specific Merck product, please call the Merck National Service Center at any time at:
1-866-342-5683

All product names listed on this site are registered trademarks owned by or licensed to a subsidiary of Merck & Co., Inc.
MerckProductServices, MerckServices, MerckSource, Merck OnCall, MerckMedicus, and MerckEngage are trademarks or registered trademarks of Merck Sharp & Dohme Corp., a subsidiary of Merck & Co., Inc.

20953312(21)-05/10-EBS-PHY