Here you'll find the answers to some Frequently Answered Questions.
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For product information, please visit our products page.
To report an adverse experience with a specific Merck human health product, please call the Merck National Service Center at 1-800-444-2080. The Merck National Service Center is pleased to assist you Monday through Friday from 8 a.m. to 7 p.m., ET., and product related emergencies can be reported at any time.
To report an adverse reaction or if you have a product-related question, please call Merck Animal Health Technical Services:
For Companion Animal (dogs, cats), please call 1.800.224.5318 Monday-Friday during the hours of 8:30 a.m. to 5 p.m. EST.
For Livestock, Poultry & Aquaculture (cattle, swine, dairy, poultry & fish), please call 1.800.211.3573 Monday-Friday during the hours of 8:30 a.m. to 8 p.m. ET.
For Equine (horses), please call 1.866.349.3497 Monday-Friday during the hours of 8:30 a.m. to 5 p.m., ET.
2000 Galloping Hill Road
Kenilworth, NJ 07033 U.S.A.
8:30 a.m.to 5:30 p.m., ET
16750, Trans-Canada Highway Kirkland, Quebec H9H 4M7 Canada
+1 514 428-7920
Merck is known as MSD outside the US and Canada.