How do i contact merck? If you have a medical question about a Merck product as a patient or healthcare professional, please contact us at [email protected] For general business related enquiries please contact us via email at [email protected] How do i report any adverse events related to merck drug? If you experience any adverse event related to Merck Drug please report the same at [email protected] or contact the Patient Safety team on 022 6210 9000. If you have a medical question about a Merck product as a patient or healthcare professional, please contact your Medical Team in your country.What are the merck manuals? The Merck Manuals are a comprehensive medical information source covering thousands of topics in all fields of medicine. They are offered as a free public service to health care professionals and the general public. I’m a medical professional or student. I’m a patient, parent or caregiver.How do i contact merck animal health for after hours emergencies? For after-hours emergencies: Call the appropriate number listed above and follow the prompts. For information about Merck Animal Health products, call Animal Health Customer Service: 800-521-5767.