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 8:00 AM to 7:00 PM ET. .

Adverse experiences and product-related emergencies can be reported at any time by dialing (800) 444-2080.

U.S. Patients and Caregivers

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:

Merck resources and information:

Merck Patient Assistance Program
(800) 727-5400

Merck Vaccine Assistance Program
(800) 293-3881

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.

These procedures are part of Merck's overall code of conduct.