Is Diclofenac gel (Voltaren) Safe for Dogs?
Why it’s a problem
Diclofenac is a potent anti-inflammatory that causes stomach ulcers and kidney damage in dogs when swallowed. Dogs are exposed by licking gel from a treated area, grooming a person’s skin, or chewing an open tube. The amount in a few grams of gel can be enough to harm a small dog.
How to keep your pet safe
Never apply diclofenac gel where a dog can lick it, and keep pets away from treated skin until the gel is fully absorbed and the area is covered or washed. Store tubes closed and out of reach, and wash your hands after applying.
Warning signs to watch for
Vomiting (possibly with blood), diarrhea, drooling, belly pain, loss of appetite, lethargy; larger exposures can cause wobbliness, tremors, and kidney failure with little or no urine.
When to call the vet
Call your vet or a pet poison hotline promptly if your dog licked the gel or chewed a tube. Early treatment with fluids and stomach protection matters, so do not wait for symptoms.
Common questions
My dog licked my leg where I had applied Voltaren gel — what now?
Call your vet or a pet poison hotline and describe how much gel seemed to be on the skin and how much your dog may have licked. Dogs have been poisoned this way, so it should be checked rather than waited out.
Is it safe if the gel is already dry and absorbed?
Fully absorbed gel leaves much less on the surface, but residue can remain on skin and clothing. Wash the area before close contact with your dog, and keep used clothing out of reach.
Can I use my Voltaren gel on my dog’s sore joint?
No. Diclofenac is not approved for dogs and can be absorbed or licked off in amounts that cause ulcers and kidney damage. Ask your vet for a dog-approved pain option instead.
More medications hazards for dogs
This page is general educational information, not a substitute for professional veterinary advice. Every pet is different — if your animal ate or touched something concerning, contact your veterinarian or a pet poison hotline right away. In the US: Pet Poison Helpline (855) 764-7661, ASPCA Animal Poison Control (888) 426-4435 (fees may apply).