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Prescribing Information for All Merck Products

Customer Service

Product-related Questions and Services by Phone
Let us assist you with information and services related to Merck and its products.

Call Us Directly

The Merck National Service Center will be pleased to assist you Monday–Friday from 8:00 AM–7:00 PM ET.

Just call us at 1-866-342-5683!

OR LET US CALL YOU

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Service is available Monday–Friday from 8:00 AM–7:00 PM ET.

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.
COZAAR and HYZAAR are registered trademarks of E.I. du Pont de Nemours and Company, Wilmington, Delaware, USA

20953179(1)-02/10-EBS-PHY