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 EST 8:30 AM to 5:00PM
- 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.
For information about HomeAgain (microchips for dogs and cats), call 888-466-3242.
For Harrisvaccines contact information, click here.