Help | Merck Animal Health USA

To report an adverse reaction, product-related problem or human exposure, please call Merck Animal Health Technical Services.

Companion Animal Technical Services, 800-224-5318
Livestock Technical Services – cows, pigs, poultry, aquaculture, 800-211-3573
Equine Technical Services, 866-349-3497
For animal toxicity questions, call ASPCA at 888-426-4435

Normal business hours are 8:30 am to 5:00 pm EST.

For after-hours emergencies, please call the numbers shown above. A recorded message will provide the telephone numbers for emergency support services if immediate assistance is needed.

For information about Merck Animal Health Products, call 800-521-5767.

We have a committed team of retail and livestock representatives ready to serve you. If you would like to have more information on any of the subjects on this website or to be connected with a Team Member in your area, please fill in the form below.

Personal Information
First Name / Initial(s)*
Last Name*
Email Address*
Phone number
Address Information
Address
City
State
Zipcode
Your Message
Select Question
Comment*
Comments
This field is for validation purposes and should be left unchanged.

Personal Information

Address Information

Your Message