Targeted relief for…
resting ITCH FACE
Do an about-face on itch with a new way forward.
IMPORTANT SAFETY INFORMATION: NUMELVI is not for use in dogs less than 6 months of age or those with serious infections. NUMELVI may increase susceptibility to opportunistic infections, including demodicosis and interdigital furunculosis. Consider the risks and benefits of treatment prior to initiating NUMELVI in dogs with a history of recurrent demodicosis. NUMELVI is a JAK inhibitor. New neoplastic conditions (benign and malignant) have been reported in dogs treated with other JAK inhibitors. The effectiveness and safety of NUMELVI have not been evaluated in a field study beyond 28 days. The safe use of NUMELVI has not been evaluated in breeding, pregnant, or lactating dogs, nor in combination with glucocorticoids, cyclosporine, or other systemic immunosuppressive agents. For complete safety information, refer to the product label.
Targeted relief for…
resting ITCH FACE
Do an about-face on itch with a new way forward.
IMPORTANT SAFETY INFORMATION: NUMELVI is not for use in dogs less than 6 months of age or those with serious infections. NUMELVI may increase susceptibility to opportunistic infections, including demodicosis and interdigital furunculosis. Consider the risks and benefits of treatment prior to initiating NUMELVI in dogs with a history of recurrent demodicosis. NUMELVI is a JAK inhibitor. New neoplastic conditions (benign and malignant) have been reported in dogs treated with other JAK inhibitors. The effectiveness and safety of NUMELVI have not been evaluated in a field study beyond 28 days. The safe use of NUMELVI has not been evaluated in breeding, pregnant, or lactating dogs, nor in combination with glucocorticoids, cyclosporine, or other systemic immunosuppressive agents. For complete safety information, refer to the product label.
Supporting those 

who care for animals
COMPANION ANIMAL
Introducing Numelviâ„¢
(atinvicitinib tablets)
Welcome to a new way forward
COMPANION ANIMAL
BRAVECTO® Quantum
Discover a new, innovative formulation of a trusted active ingredient.
COMPANION ANIMAL
Mometamax Singleâ„¢
Discover a convenient single-dose, in-clinic treatment for canine otitis externa. With a novel combination of active ingredients, this treatment provides the best of 3 worlds.
Companion animal
Discover Nobivac® nxt-level protection
Nobivac® NXT (next) are the first and only companion animal vaccines to use revolutionary RNA particle technology
Animal health professional
Professionals in Your Corner
Providing veterinary professionals with the latest technical knowledge and quality CE. Learn how our team can provide expertise in your areas of interest.
Professionals in Your Corner
Providing veterinary professionals with the latest technical knowledge and quality CE. Learn how our team can provide expertise in your areas of interest.
Learn moreThe Trusted companion for Animal Health Professionals
Our customers have always known that they can depend on Merck Animal Health for more than just medicines.
Large and farm animals
Cattle
Of all the challenges you take on, we know an ever-evolving industry is one of the biggest. We want to help you continue to be invaluable to your clients by supporting you how you deserve to be supported – and arming you with innovative products to address whatever comes your way.
Latest news releases
March 4, 2026
Merck Animal Health Awards $50,000 in Scholarships to Five Next Generation Swine Veterinarians
February 27, 2026
FDA Approves NUMELVIâ„¢ (atinvicitinib tablets) for Dogs from Merck Animal Health
The First and Only Second-Generation Janus Kinase (JAK) Inhibitor for the Control of Pruritus Associated with Allergic Dermatitis
December 12, 2025
Merck Animal Health Announces Availability of Circumvent® CL, a Ready-to-use Vaccine Protecting Pigs Against Porcine Circovirus Types 2a and 2d and Lawsonia intracellularis
December 4, 2025
FDA Conditionally Approves Merck Animal Health’s EXZOLTâ„¢ CATTLE-CA1 for the Prevention and Treatment of New World Screwworm (Cochliomyia hominivorax) Larvae (myiasis)
November 6, 2025
Merck Animal Health Donates $20,000 to the University of Nebraska–Lincoln Klosterman Feedlot Innovation Center to Advance Sustainability-focused Research for Feedlot Cattle
LegUp Program
Merck Animal Health’s Leg Up Program is designed to empower veterinary support staff specializing in equine practice.
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