Benadryl dosage for dogs | Effects and Uses [Full Guide]

Author: | Posted in Dogs Health No comments

Benadryl Dosage For Dogs

A lot of people want to know about Benadryl for dogs.

In this post, I am going to answer the all common question about Benadryl its dosage and uses for dog.


Dogs generally get sick by allergies. One of the major sicknesses of dogs is skin allergies. If you searching any medication for this it first comes to Benadryl. 

Here, we will get to know whether Benadryl for dog is good or not.

Standard Benadryl dosage for dog.

How much Benadryl they should take, its side effects and precautions.

What is Benadryl for Dog?

The first thing that comes to mind is that what Benadryl is?

Benadryl is an anti-allergen. It has active ingredient DIPHENHYDRAMINE which is the active agent to treat allergies.

It is also known as DPH. So, it is mainly a drug that is also known as Diphenhydramine drug.

Benadryl is an antihistamine. It hinders H-1 receptors on smooth muscles and blood vessels. H-1 is linked to intracellular G-protein.

It activates phospholipase C and phosphatidylinositol signaling pathways. Antihistamine, acting on these receptors is used as anti-allergy medicine.

Diphenhydramine is the H-1 antagonist. It prevents the uptake of histamine.

Histamine is the substance that causes allergic reactions. It is present in many forms such as cream, gel, stick, spray and also in liquid form.

Histamine which is the actual cause of allergies is treated by using this medicine. This medicine only helps after the effects of allergy have started.

If the allergy is not caused yet, you cannot use it beforehand to avoid the symptoms of allergy to occur.

It helps in decreasing the redness of nose, watering eyes, and loss of appetite.

What Is Benadryl For Dogs


Why Should Dogs Take Benadryl?

Benadryl is a useful drug and often is given to dogs that are sick. It is given to dogs which show the following signs;

  • Allergies
  • Insomnia
  • Motion sickness
  • Diarrhea Vomiting
  • Indifferent reactions to vaccines
  • Restlessness
  • Itching
  • Sting or bites
Benadryl can benefit the dogs with these problems. It is an effective drug and is accessible.

Why Should Dogs Take Benadryl

When Not to Use?

There are some conditions when the use of Benadryl is not recommended.

The situation such as rising blood pressure of your pet, glaucoma or any cardiovascular illness should be avoided while using this medicine.

Using this medicine in this kind of situations may cause harm to your pet.

Benadryl For Dogs

The best solution to avoid such issue is to contact your veterinarian before dosage and take a proper recommendation for using the drug.

If the pet is having difficulty in breathing and has facial swelling it is suggested that immediately visit your vet and take medication.

Sometimes it is best to use a combination of different medicines to eradicate the infections lying inside the body.

Related: Can Dogs Eat Apples

Is it Safe for Your Pet?

Benadryl is useful and advantageous for your pet dog as it cures many diseases. But is Benadryl safe for the dog?

Benadryl is safe for dogs until it is taken in large amounts. Average Benadryl dosage for dogs is 1mg per pound

An overdose of Benadryl can cause many problems. But if taken in measured amounts which are described by your pet’s trained physician. So before giving your dog Benadryl check the dosage.

25 mg formulation of a tablet is better for your pooch.

Never exceed 80 mg dosage for a dog irrespective of its size.

Consult your veterinarian before giving Benadryl to your pet.

Although FDA does not approve the use of Benadryl for dogs if the right amount is given to the dog and then the conditions are administered properly.

The capsules which are time-released should be avoided because they cause extra dosage that may cause harm to your dog.

However, the dogs are not capable of properly digesting the capsules. The proper recommendation of your vet is required.

Never combine more than one antihistamine medicines because they may produce toxic results.

Also, it is suggested not to give this medicine to pregnant dogs unless prescribed by the vet.

Is It Safe For Your Pet


Related: Can Dogs Eat Peas

Benadryl Dosage For Dogs

How much dosage of Benadryl for a dog?

Benadryl dosage for dogs depends on the dog’s pound of body weight. Benadryl is an effective drug but the amount of consumption should be measured.

It’s too low dosage is also not effective. So the amount of Benadryl given to dogs should be measured and prescribed.

Dog Benadryl Dosage Chart

The amount of Benadryl in accordance to the dog’s body weight is given below,

1 mg of Benadryl for 1 lb weighed dogs.

But the more convenient amount of dosage suggested by doctors is:

10 mg of DPH for 30 lb or less weighed dogs

25 mg of DPH for 30 to 50 lb weighed dogs

50 mg of DPH for 50 or more than 50 lb weighed dogs

The interval between giving dosage: 8 hours

Some Dr. also suggests

50 mg of DPH for 50 pounds weight dogs around every eight hours.

Benadryl will be effective when you will give it to your dog 3 times a day.

When your dog has had the problem in swelling or its face is swelled and it can’t take Benadryl. You could also inject Benadryl in it.

How Much Dosage Of Benadryl For A Dog

How to Give it to The Dog?

You can insert it into the dogs’ body in many forms. You can also give Benadryl tablet to your dog.

First of all, you can take a standard teaspoon size of 5 mL and after taking proper measurement give it to your dog.

It is suggested not to use alcohol while turning it into liquid.

5 mL amount of liquid Benadryl holds diphenhydramine of 12.5 mL. The amount of Benadryl that should be given to your dog depends on the weight of the dog.

Secondly, the dogs that dislike the taste of liquid medicine, tablets are recommended.

How To Give It To The Dog

The third form is to inject the medicine. It is used when the airway to the stomach of your dog is blocked by the intense allergy.

Normally it is injected into the muscle tissues of dog, under his skin or into the blood vessel. Not only are these three forms available.

You can also use it in the form of a gel, spray, cream, etc. but these forms include less amount of medicine in them.

Here are full details how to give Benadryl to your dog.

How Much Time does it take to Work?

The approximate time for Benadryl to start working is almost 30 minutes. Monitor the dog properly before and after dosing in the medicine.

Benefits Of Benadryl For Dog

  • Benadryl is antihistamine and it benefits your pet dog in many ways. It gives it relief from many allergic reactions.
  • It is also helpful in motion sickness.
  • It is a mild sedative so helps in insomnia and gives relief by reducing the anxiety.
  • It is anti-inflammatory so reduces pain and inflammation during stings and bites.

Benefits Of Benadryl For Dog

Major Side Effects of Using Benadryl for Dog

It is not such a harmful drug because it is used only for treating small allergies that are not such a big issue.

But it is probable that it may cause some of the side effects. It makes your dog act more oddly and out of the normal routine.

When you give your pet dog Benadryl and he shows the following symptoms then you should not be worried as these symptoms are the side effects of Benadryl.

These symptoms are listed below,

  • Drooling
  • Excitability
  • Increased breathing rate
  • Reduced rate of urination
  • Dry mouth
  • Diarrhea
  • Depression (tension)

Don’t worry about these symptoms these will disappear as soon as the original sickness ends.

If your pooch shows these symptoms during the period he is consuming Benadryl then you should not make yourself worry and tire yourself by going to different doctors.

It also causes the mouth to dry out, lethargic conditions, laziness and urine retention. These are some of the common reactions that are caused by the use of this medicine.

There are some other symptoms proved with research that may appear in your pet. Those symptoms include loss of appetite, vomiting, diarrhea, nausea, digestive disorders, and allergic reaction if not given inappropriate amount and situations.

If the pet shows too much such reactions, go immediately to your vet and take the prescribed medicine for healing.

Benadryl For Dog

Related: Can Dogs Eat Peanuts

Result Of Taking Overdose Of Benadryl

Benadryl is beneficial for dogs but if your pet dog consumes more dosage of medicine than prescribed then it can be dangerous for it.

If your dog eats too much like 5 or 10 times more than the prescribed dose then you should take it to a trained veterinary doctor.

After taking the high dose of Benadryl your pet dog will not act like itself. It may show signs of high consumption.

  • Distress
  • Extreme lethargy
  • Offensive behavior
  • Trouble breathing
  • Muscle seizures
  • Increase in body temperature

When these signs appear then you should rush to your pet dog’s doctor.

Resuult Of Taking Overdose Of Benadryl

Best for The Treatment of These Diseases

The diseases it can cure vary. Benadryl is mostly used to cure allergies, but some of the other diseases to the cure of this medicine are here.

Insomnia is treated in dogs by blocking acetylcholine with the help of Benadryl. This chemical causes sleepiness in your pet. Sleep period is reduced by using this drug.

Benadryl Dog Dosage

Vomiting in dogs is actively cured by using Benadryl. Sickness and nausea are also treated by this drug.

There are certain properties in this product that keeps your dog calm and avoid nervousness

Itching, bites, and sting are excellent to treat by this medicine. There are some anesthetic qualities that provide relief to your dog and decreases the pain caused by bites and stings.

In the case of stings, it may be difficult to give medicine from the mouth. Because of the swelling, the airway is blocked so use alternative sources.

Which Chemical Formulation of Benadryl is Good For Dogs?

Benadryl is an effective drug for dogs when it is composed of diphenhydramine.

Benadryl is also available for human beings; this will not benefit your dog as the active agent gets changed.

It contains acetaminophen or pseudoephedrine which is toxic for dogs. Liquid Benadryl has alcohol which is not good for your dog’s health.

Products having artificial sweetness are also not good for your dog.

Benadryl For Dog - Formulations

Substitute To Benadryl

Benadryl is effectiveness for a long time period may reduce so you should give your dog drugs that are many substitutes for Benadryl.

There are many medicines which can work and give the same results as Benadryl gives. These are,

  • Cetirizine
  • Loratadine
  • Chlorpheniramine
  • Pholcodine

These are all good and effective for dogs. These are antihistamines so work like Benadryl and benefit your pet dog.

Benadryl For Dog - Substitute


While using Benadryl for dog, there are certain cautions to keep in mind. If you are visiting a vet, don’t forget to tell him the names of other medicines that your dog is using and also other medical issues like blood pressure of glaucoma.

Dog Benadryl Dosage Chart

It is necessary to avoid wrong outcomes. The dogs suffering from liver, heart or kidneys are at greater risk and complications may arise.

Also, avoid the use of other drugs because it may cause a reaction due to contradicting chemicals present in drugs.


  • Benadryl should not be given to the dogs which are pregnant or to diabetic dogs.
  • The dogs having high blood pressure or any heart disease should also not consume Benadryl.
  • Don’t mix other medications with Benadryl.
  • It should not be given to newborn pups.
  • Also, avoid medicines containing camphor as it is not good for your dog.

Benadryl For Dogs - Precautions


Although Benadryl for dog is one of the most common drugs. However, it has multiple interesting usage that can be understood.

Can- I Give My Dog Benadryl For Itching

It is recommended for dogs but one should take care of the dosage. The treatment also carries few risks for pets.

Add Your Comment

You must be logged in to post a comment.