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If you’re wondering, “Is Benadryl used as a calming agent in dogs?” this article will provide answers to all your questions, including Will Benadryl calm a hyper dog? Will it calm a dog affected by fireworks? And more. Let’s get started!


What is Benadryl Used for in Dogs?

Diphenhydramine, also known as Benadryl, is an antihistamine used in humans to treat allergies. It also has secondary uses, including countering nausea and extrapyramidal tremors.

It is also used to treat a variety of conditions, including motion sickness and drowsiness. 

Diphenhydramine is safe for dogs but can cause side effects, including drowsiness, tachycardia, ataxia, and drowsiness.


The dosage of Benadryl for dogs varies depending on the size of your dog and its weight. A common dosage is two to four milligrams per kilogram of body weight, but the exact dosage will vary depending on the size of your dog. 

It is also important to note that dogs have a different absorption rate than humans, so time-release capsules may not be as effective in relieving anxiety in dogs.

Will Benadryl Calm a Dog Down from Fireworks?

The over-the-counter drug has mild sedative properties, but it is not known whether it will calm down the animal’s fear of fireworks. Fireworks can trigger the fight-or-flight response in dogs, and they will bark and try to flee. 

It is best to consult a veterinarian before giving your pet Benadryl for fireworks anxiety.

While humans can prepare for the sound of fireworks, dogs are not able to anticipate the sounds, colors, and movements of the fireworks. 

Additionally, fireworks are extremely loud and dogs are not able to understand the intervals or dates. Because fireworks are so unpredictable, they can trigger the fight, flight, or freeze response in dogs. 

If your dog runs away from fireworks, he may feel trapped or startling.

How Does Benadryl Calm a Hyper Dog?

Benadryl contains an antihistamine drug, Diphenhydramine which works on histamine receptors. It is used to treat allergies in dogs while showing sedative characteristics. It can calm down a hyper dog when given in recommended dose.

While over-the-counter Benadryl is not approved for use in veterinary medicine, it is safe for dogs and is helpful in treating several different conditions. 

Benadryl has some side effects that you should be aware of, so you should always consult with your veterinarian before giving it to your dog. Below is a list of symptoms and dosages. Keep reading to learn more about Benadryl for dogs.

Dosage is also important. While the dosage is usually the same as for humans, your dog’s weight will determine the dosage. For small dogs, a tablet of Benadryl is usually sufficient. 

If your dog is too large for tablets, try giving it in a smaller dosage. For older dogs, you can give them one tablet every other day. 

However, make sure you give your dog the right dose to ensure that he or she is comfortable with the dosage.

Benadryl Dosage to Calm Down a Dog

A vet will advise you on the appropriate Benadryl dosage for your pet. Typically, you should give your dog (30 kg) three 25-mg tablets before bedtime. 

However, due to a lack of communication, I gave him two extra pills. As my dog is 60 pounds, he would have received 125 mg. A dog needs a higher dosage to calm down than a human would require. 

If you notice your dog is not responding to Benadryl, please contact your veterinarian immediately.

Benadryl Overdosage and Side Effects

Aside from the dangers of an overdose of Benadryl in your dog, it can also cause high blood pressure. If your dog experiences a rapid rise in blood pressure, this can lead to seizures and other serious medical problems. 

A vet will be able to prescribe the correct dosage and will also give you a prescription based on your dog’s weight. Using Benadryl is not recommended if your dog has a history of serious medical conditions.

Benadryl Common Side Effects in Dogs

Some of the common side effects of Benadryl in dogs include vomiting, diarrhea, and increased heartbeat. 

Your pet may also experience decreased appetite, difficulty breathing, and trouble breathing. If you notice any of these symptoms in your dog, consult a veterinarian immediately. 

Overdoses of Benadryl in dogs can be dangerous, so don’t give it to your dog unless it’s clearly needed. Benadryl is not recommended for pregnant or nursing dogs and can cause an overdose.

Despite these common side effects, Benadryl is useful for treating allergic reactions in dogs and people. 

It can relieve itchiness and relieve the swelling associated with bee or insect bites. However, you should always seek advice from a veterinarian to determine the cause of your dog’s reaction. 

Using Benadryl as an overdose can cause life-threatening overdose symptoms. Fortunately, many other medications are available.

Read also: Can You Kill a Dog with Benadryl Medication?


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