How Much Benadryl Can I give my Dog in Arvada, CO?

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Dogs come in all shapes and sizes, so it’s no wonder that their medicine requirements vary, too. If your dog has allergies, you may be wondering how much Benadryl you can give them. The short answer is that the appropriate dosage of Benadryl for dogs depends on their weight. However, there are a few other factors to consider before giving your dog this medication.

Most dog parents have some Benadryl in their medicine cabinet for themselves, so it’s only natural to wonder if it’s safe to give some to your dog when they’re feeling under the weather. The short answer is yes, you can give your dog Benadryl, but only under the guidance of a veterinarian. Here’s what you need to know about giving this popular over-the-counter medication to your pup.

What is Benadryl?

Benadryl, also known as diphenhydramine, is an over-the-counter antihistamine medication that can be administered to dogs. According to the journal of Veterinary Medicine, Diphenhydramine is effective and safe for use in animals. The journal also advises that the dosage given to animals should be determined by a veterinarian, as the correct dosage varies depending on the animal’s size and weight.  When used correctly, Benadryl can provide relief for a variety of conditions in dogs, including allergies, anxiety, and motion sickness.

How Much Benadryl Can I give my Dog in Arvada, CO?

The Right Dosage for Your Dog

The recommended dosage of Benadryl for dogs is 1 mg per pound, administered every 8 to 12 hours, as needed. For example, a 25-pound dog would need 25 mg of Benadryl, and a 50-pound dog would need 50 mg of Benadryl. This dosage is safe for most dogs, but it’s always best to check with your veterinarian before giving your dog any medication.

When to Give Benadryl to Your Dog

You should always check with your veterinarian before giving your dog any medication, even something as seemingly harmless as Benadryl. They will be able to give you the most accurate advice based on your dog’s individual health and circumstances. Benadryl is typically only given when needed for allergy relief or to calm anxious dogs. It is not meant for long-term use. In general, it’s best to give Benadryl to your dog when they are experiencing allergy symptoms like itching, redness, or swelling.

How to Administer Benadryl to Your Dog

Administering pills to dogs can be difficult and stressful- both for the dog and their owner. However, giving a pill to a dog disguised as a treat is a relatively easy process. Dogs are food-motivated and will often eat anything put in front of them, so using this to your advantage can make giving them a pill much simpler.  Try to choose a treat that is small, soft, and easy to chew so that your dog can eat it quickly.

benadryl to my dog

Side Effects of Benadryl on Dogs

Side effects of Benadryl on dogs can vary depending on the individual dog and the dosage given. However, the most common side effects of Benadryl for dogs are drowsiness and dry mouth. In some cases, dogs may also experience vomiting or diarrhea. it’s important to consult with a veterinarian before giving your dog Benadryl, as it can interact with other medications that they may be already taking.

Side effects of Benadryl for dogs can include:

  • Drowsiness
  • Dry mouth and eyes
  • Urinary retention
  • Gastrointestinal upset
  • Vomiting
  • Diarrhea

While these side effects are usually not serious, in some cases, dogs may have an allergic reaction to Benadryl, which can be life-threatening. That is why it is always important to talk with your veterinarian before ever giving your dog a pill.


Many dog parents are surprised to learn that Benadryl is generally safe for dogs in the right dosage. Benadryl is an antihistamine, which can be helpful in treating a number of conditions like allergies, travel sickness, and insect bites. Be sure to talk to your vet first, though, as they will be able to give you an accurate dosage for your pup.

If you have any questions about your dog’s health, please call us at (303) 424-4439 or schedule an appointment with us online!

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