Consumers:
For consumer or patient-related questions, please contact your physician, pharmacist or other health care provider.
To report an adverse experience with a specific Merck product, please call the Merck National Service Center at +1 800-672-6372.
Health Care Professionals:
If you are a physician, pharmacist or other health care provider and have a question(s) or need information about a specific Merck product or service, please call the Merck National Service Center for Health Care Professionals at +1 866-448-7590.
For Stock Holders:
Tel: +1 800-522-9114
Monday-Friday, 7AM – 7 PM CST
For Institutional Investors and Analysts:
Tel: +1 908-423-5881
Monday-Friday, 8:30 AM – 4 PM ET