Contact Us

For more information on Protazil, please call Customer Service at 1-800-521-5767 or visit

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

Companion Animal (Dogs, Cats, Horses) 800-224-5318

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.

Postal Address
Intervet Inc.
556 Morris Avenue
Summit, NJ 07901

Equine Tech Services number 866-349-3497

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