Is Benadryl (diphenhydramine) Toxic to Dogs?
Yes — benadryl (diphenhydramine) is mildly toxic to dogs.
PawSafe Check is for general information only and is not veterinary advice. Always contact your veterinarian or a poison control service if you think your pet has been exposed.
Symptoms to watch for
- Sedation or agitation
- Dry mouth
- Fast heart rate
- Vomiting
Toxic parts
Tablets, liquids, combo products
Toxic compound
Diphenhydramine
What to do now
- Remove any plant material from your dog's mouth and keep it out of reach.
- Gently rinse the mouth and offer fresh water.
- Call your vet if symptoms persist, get worse, or your dog is small, young or elderly.
Good to know
Vets sometimes recommend diphenhydramine at specific doses, but overdoses cause agitation or sedation and a fast heart rate. Some products also contain decongestants, which are dangerous.
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Frequently asked questions
Is benadryl (diphenhydramine) toxic to dogs?
Yes — benadryl (diphenhydramine) is mildly toxic to dogs. Vets sometimes recommend diphenhydramine at specific doses, but overdoses cause agitation or sedation and a fast heart rate. Some products also contain decongestants, which are dangerous.
What are the symptoms of benadryl (diphenhydramine) poisoning in dogs?
Sedation or agitation. Dry mouth. Fast heart rate. Vomiting.
What should I do if my dog ate benadryl (diphenhydramine)?
Remove any plant material from your dog's mouth and keep it out of reach. Gently rinse the mouth and offer fresh water. Call your vet if symptoms persist, get worse, or your dog is small, young or elderly.
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