Thank you for your interest in learning more about our company. In an effort to answer your inquiries, the following information is provided for your convenience.
Merck Corporate Headquarters
One Merck Drive
P.O. Box 100
Whitehouse Station, NJ 08889-0100 USA
Monday-Friday 8:30 AM - 5:30 PM ET
Merck Worldwide Contact Information
Contact information for Merck worldwide is available here.
U.S. Healthcare Professionals
To speak with a Merck healthcare professional about Merck products, or to report an adverse experience with a specific Merck product, please call the Merck National Service Center at (800) 444-2080. The Merck National Service Center is pleased to assist you Monday through Friday from 8 AM to 7 PM ET.
Adverse experiences and product-related emergencies can be reported at any time by dialing (800) 444-2080.
To report an adverse reaction or a product-related problem, please call Merck Animal Health Technical Services:
(800) 224-5318 Companion Animal (Dogs, Cats)
8:30 am to 5:00 pm EST
(800) 211-3573 Livestock, Poultry & Aquaculture (Cattle, Swine, Dairy, Poultry & Fish)
8:30 am to 8:00 pm EST
(866) 349-3497 Equine (Horses)
8:30 am to 5:00 pm EST
If you have questions relating to Merck prescription products, your medical condition or personal health matters, please contact your physician or healthcare provider since he or she is most familiar with your medical condition. Merck cannot respond to questions about general medical information or information regarding your specific condition.
To report an adverse experience with a specific Merck product, please call the Merck National Service Center at 800-444-2080.
For information on our U.S. patient assistance programs:
Contact information for the Merck Research Network is available here.
Questions about supplier diversity at Merck? Contact us.
Contact the Merck Board of Directors
Merck will forward all communications from security holders and interested parties to the full Board, to non-management directors, to an individual director or to the chairperson of the Board Committee that is most closely related to the subject matter of the communication, except for the following types of communications:
communications that advocate that the company engage in illegal activity;
communications that, under community standards, contain offensive or abusive content;
communications that have no relevance to the business or operations of the company; and
mass mailings, solicitations and advertisements.
The Corporate Secretary, in consultation with the General Counsel, will determine when a communication is not to be forwarded. The company’s acceptance and forwarding of communications to the directors does not imply that the directors owe or assume any fiduciary duties to persons submitting the communications.
Write to the Merck Board
Board of Directors (or name of individual director)
Merck & Co., Inc.
P.O. Box 1150
Whitehouse Station, NJ 08889
Contact the Merck Audit Committee
Employees and stockholders may raise a question or concern to the Audit Committee regarding accounting, internal accounting controls or auditing matters by following the procedures located on Page 2, “Additional Assistance,” of Merck Code of Conduct – Our Values and Standards.