Thank you for your interest in Merck & Co., Inc..  In an effort to answer your inquiries, the following information is provided for your convenience.

Merck & Co., Inc.
One Merck Drive
P.O. Box 100
Whitehouse Station, NJ 08889-0100 USA
Phone: 908-423-1000
Monday-Friday 8:30 AM - 5:30 PM ET

Contact information for Merck worldwide is available here.

If you are a physician, pharmacist, or other healthcare provider and have a question(s), or would like to report or need information about a specific Merck product or service, please click here.

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.

Contact information for US Patients & Caregivers

Contact information for Stockholders and Investors is available here.