Contact us

Merck Animal Health Corporate Headquarters

Our corporate headquarters is located at:

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

For Animal Health information and contact information outside the U.S.:

Contact us – Corporate Home Page – MSD Animal Health

For Animal Health information in U.S.:

U.S. Products & Services and Adverse Event Reporting

For information about Merck Animal Health’s products and services including the reporting of an adverse event or product quality complaint with a specific Merck Animal Health product, please call:

Companion Animal Technical Services:

Equine Technical Services

Livestock Technical Services

U.S. Merck Animal Health Customer Service and Sales Inquiries

U.S. Allflex Identification

U.S. Livestock Monitoring

Business Development

Merck Animal Health Ventures

Suppliers / Financial Inquiries

Visit our supplier support site

To inquire about invoice and payment issues, please visit our site for suppliers.

Merck Animal Health Media Relations

For Animal Health media questions:

For general media questions: