How Much Benadryl Can I Give My Dog?


Benadryl, also known by its generic name diphenhydramine, is one of the few over-the-counter drugs that vets routinely have owners administer at home. While it is typically well endured and has a large safety margin, there are a couple of things owners ought to keep in mind before dosing it at home.

Benadryl Usage

Benadryl is an antihistamine, obstructing the H-1 receptors on smooth muscle and blood vessels. A few of its most typical indications are the treatment of environmental allergic reactions, allergies to insect bites or stings, and pre-treatment of vaccine reactions. It likewise has some effectiveness in the prevention of motion sickness in dogs and as a moderate sedative.

How Does Benadryl Work?

Diphenhydramine is a receptor antagonist, which implies that the drug works by blocking the receptors that get histamines in the body. This alleviates a lot of the symptoms associated with allergic reactions, like itching, sneezing, and hives. The body still produces histamines, but the receptor villain blocks the receptors from signing up the histamines. It is a bit like the mail-person trying to provide mail to an already complete mail box. The letter arrives, however there is no room for it.


Benadryl is contraindicated with particular conditions, such as animals with glaucoma, hypertension, and heart disease. It’s constantly best to call your vet for assistance before administering any medication to your pet, including Benadryl.

Benadryl Dosage for Dog

The basic dose for oral Benadryl is 1 mg per pound of body weight, given 2-3 times a day. The majority of drug store diphenhydramine tablets are 25 mg, which is the size used for a 25 pound dog. Constantly double check the dose before providing an over the counter medication. In addition, many formulas are combined with other medications such as Tylenol so make certain Benadryl tablets contain only diphenhydramine.

When Does Veterinarian Should Be Involved?

Oral Benadryl is considered a moderate to reasonably effective antihistamine. If a pet is having an acute allergy with facial swelling or difficulty breathing, avoid the oral medications and go straight to the vet. Lots of allergic diseases need a combination of medications and treatment of underlying infections; if your animal is not reacting to the medication, speak to your vet for other options.

Reyus Mammadli
Having engineering and medical education, in recent years actively engaged in the study of the development, reproduction of domestic animals. Special attention is paid to the treatment and prevention of diseases of Pets.
Pet Health
Leave a Reply