U.S. Merck corporate headquarters
126 East Lincoln Avenue
P.O. Box 2000
Rahway, NJ 07065 USA
To reach a Merck employee, please call:
Monday – Friday, 8:30 am – 5:30 pm ET
Products & services and adverse event reporting
For information about Merck’s products and services including the reporting of an adverse event or product quality complaint with a specific Merck product, please call the Merck National Service Center:
Monday – Friday, 8:00 am – 7:00 pm ET
You can call this number 24/7 for any product-related emergency
Do you need help paying for your medications?
We understand that many things can add to the stress of medical treatment. If you are unable to afford your prescribed medications, we may be able to help you. See what programs are available to eligible patients in the U.S.
To inquire about invoice and payment issues, please visit our site for suppliers.
Merck Animal Health
If you are based in the USA and have questions on our products or our organization, please visit the Merck Animal Health USA contact page.
If you are outside the USA, please send an email to: firstname.lastname@example.org
Our Merck Animal Health headquarters is located at:
2 Giralda Farms
Madison, NJ 07940 USA