For US Healthcare Professionals
Sign In
User name    (Forgotten?)

Password     (Forgotten?)


 Remember me

You can use your MerckMedicus user name and password.

Need to Register?
Viewing files designated with requires a PDF reader
Opening files designated with requires a Zip reader

Let us assist you with information and services related to Merck and its products.

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.

E-mail Us a Medical Question

You must be a licensed and validated US physician in order to submit a question online. Sign in with your user name and password in the form above to gain access to this service, or register now.

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

COZAAR and HYZAAR are registered trademarks of E.I. du Pont de Nemours and Company, Wilmington, Delaware, USA
FOSAMAX PLUS D is a trademark of Merck & Co., Inc.
VYTORIN and ZETIA are registered trademarks of MSP Singapore Company, LLC. View the Merck/Schering-Plough privacy policy.
All other brand names are registered trademarks of Merck & Co., Inc.
MerckServices and MerckSource are registered trademarks of Merck & Co., Inc.
MerckProductServices and MerckMedicus are trademarks of Merck & Co., Inc.

20752836(1)-11/07-EBS-PHY