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

  • Companion Animal Technical Services – Dogs & Cats: 800-224-5318
  • Livestock Technical Services – Cattle, Swine, Poultry, and Aquaculture: 800-211-3573
  • Equine Technical Services: 866-349-3497

For after-hours emergencies: Call the appropriate number listed above and follow the prompts.
For information about Merck Animal Health products, call Animal Health Customer Service: 800-521-5767
For information about microchip identification in dogs and cats, call HomeAgain: 888-466-3242.