Is Benadryl Safe For Dogs?

Can you give your dog Benadryl? In this blog, we’ll discover if Benadryl is good for dogs, and if it is something that can help with your dog’s seasonal allergies…

Oct 04, 2023·4 min read
Is Benadryl Safe For Dogs?


There are a lot of things that are similar between us and our furry best friends, one of which is suffering from seasonal allergies!

During the spring and summer months, you may notice your pup starting to paw lick, sneeze, itch, and shake their head more often, which could be a sign they have seasonal allergies

When our allergies flare up, and tissues become a necessity, many of us will rely on medication, but what can we do to help our pups? This leads many of us to question, can dogs take Benadryl?

This popular over-the-counter medication is used by millions to relieve symptoms of allergies, so can it also be used for dogs? 

Well turns out they can… but with some important caveats.

Can Dogs Take Benadryl?

Benadryl contains an active ingredient called diphenhydramine, which is generally considered safe for dogs when used properly and under the guidance of a veterinarian. However, it’s crucial to remember that not all dogs are the same, and what may be safe for one dog might not be safe for another.

Top Tip: Before giving Benadryl to your dog, you should always consult with your veterinarian.

A white and tan medium-sized dog pokes its head out of big yellow wildflowers. Only the dog's amber eyes can be seen.

Does Benadryl Help with Seasonal Allergies in Dogs?

While Benadryl can be safe for dogs, it’s essential to follow proper guidelines to ensure your furry friend’s safety. Here are some tips on how to give Benadryl to your dog safely:

Consult Your Veterinarian

As mentioned above, it’s crucial to consult your veterinarian before giving any medication to your dog, including Benadryl. Your vet will be able to determine the appropriate amount you need to give your dog based on their weight, age, and overall health. Never guess the amount or give your dog Benadryl without consulting your vet first. 

Give Your Dog The Correct Amount

Benadryl comes in various forms, such as tablets, capsules, and liquids. The typical dosage for dogs is 1 mg of Benadryl per pound of body weight. However, this may vary depending on your vet’s recommendation, so always follow their instructions.

A black and white dog, with pointy ears, strolls through wildflowers and long grass

Look Out For Side Effects

Like any medication, Benadryl can cause side effects in dogs. The most common side effect is drowsiness (just like in us humans), and some dogs may also experience dry mouth, increased heart rate, and urinary retention. If you notice any unusual symptoms after giving your dog Benadryl, contact your vet immediately.

Use Plain Benadryl

When giving Benadryl to your dog, make sure to use plain Benadryl without any added ingredients. Some Benadryl products contain additional ingredients like decongestants or pain relievers, which can be harmful to dogs. Stick to plain diphenhydramine and avoid any combination products unless specifically directed by your vet.

Final Thoughts

So, Benadryl can be safe and effective for dogs when used properly and under the guidance of a veterinarian. It can help relieve symptoms of seasonal allergies in dogs and provide them with short-term relief from itching, sneezing, and other discomforts. However, it’s crucial to follow proper dosing instructions, consult with your vet, and watch for any potential side effects.

Remember, not all dogs are the same, and what might be safe for one dog might not be safe for another. Your vet knows your dog’s medical history and can provide you with the best advice on whether Benadryl is suitable for your dog and what the appropriate dosage should be. Always consult with your vet before giving any medication to your dog, including Benadryl.

As a responsible pet owner, it’s also essential to explore other options to manage your dog’s seasonal allergies. This may include avoiding allergens, keeping your dog’s living environment clean, giving your pup a probiotic to support their immune system, using hypoallergenic bedding, and bathing your dog regularly to remove allergens from their fur. Your vet can provide you with a comprehensive plan to manage your dog’s allergies and help them lead a comfortable and healthy life.


Author Burke, Anna, “Benadryl For Dogs”, American Kennel Club, April 23. 2021,

Becca TriggB

Becca Trigg

An all round animal lover, who absolutely adores writing and researching anything puppy! Over the past few years, I have been able to gain ample pet knowledge; specifically joint health and dental hygiene. When I'm not typing away in the office, I can be found sitting in a country pub or growing chillies

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The information contained within this site is not intended as a substitute for professional medical or veterinary advice. PetLab Co. is not intended to diagnose, treat, cure or prevent any disease. If your pet has, or you suspect your pet has any medical condition, you are urged to consult your veterinarian. Medical conditions can only be diagnosed by a licensed veterinarian. These statements have not been evaluated by the Food and Drug Administration. Results May Vary. Not intended for human consumption. Please consult your veterinarian regarding any change in treatment or supplementation.
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