Can I Give My Dog Benadryl for Allergies?

Your dog is sneezing and itchy because of allergies. You may wonder: Can I give my dog Benadryl everyday for allergies?

can I give my dog benadryl everyday for allergies

Can I give my dog Benadryl every day for allergies?

Yes, but you should only use Benadryl for short-term relief. It can help relieve itching and other symptoms of allergies, however, it isn’t intended to be used on a regular basis.

If you’re going to use Benadryl as a daily allergy treatment, I would recommend using it only two or three times a week at most. If your dog has severe allergies and needs more than that, talk to your vet about other options like steroids or immunotherapy (allergy shots).

Please note: Some people give their dogs Benadryl every day for allergies because they think it will help them sleep better at night. But there’s no evidence that this works for most dogs — and it can be dangerous if used too often or for too long.

How much Benadryl can you give a dog for allergies?

The standard dose for allergies in dogs is 1 mg per pound of body weight, every 8 to 12 hours.

Giving Benadryl will help with mild allergies, but it may not stop the allergic reaction completely. During that time it’s important to take your dog to a veterinarian so they can assess the severity of the situation and decide on a proper course of action.

What are the side effects of giving Benadryl to dogs?

The side effects of giving Benadryl to dogs include drowsiness and agitation. In very rare cases, some dogs may experience elevated blood pressure or increased heart rate when they take this drug. You should also be aware that if your dog takes too much Benadryl, it could cause death in the worst-case scenario.

The most common side effects associated with giving your dog Benadryl include:

  • Dry mouth
  • Dizziness
  • Headache
  • Nausea or vomiting

Most side effects are mild and temporary and go away within 24 hours of discontinuing treatment.

Can I give my dog BENADRYL® Allergy Plus Congestion?

No, you should not give your dog BENADRYL® Allergy Plus Congestion because it contains the decongestant phenylephrine/pseudoephedrine. Decongestants can make your dog’s heartbeat faster than normal, cause tremors, raise blood pressure and even lead to seizures, coma, or death.

Please note: Taking any over-the-counter drug that contains phenylephrine/pseudoephedrine is risky for dogs because of their lack of resistance to these chemicals. Therefore, it is generally not recommended to give your dog any OTC drugs that contain these substances.

Can I give my dog Claritin for congestion?

Claritin-D should not be given to animals as it may cause serious side effects such as vomiting or tremors. In fact, the drug carries an explicit warning on its package insert stating that Claritin-D should not be administered to animals under any circumstances.

Is Vetadryl the same as Benadryl?

Yes. If possible it’s best to buy the Vetadryl because it’s manufactured specifically for use in dogs and cats. Vetadryl contains a lower dosage and therefore causes fewer side effects than other forms of diphenhydramine.

The dosage will be different depending on your pet’s weight, so always follow the instructions on the label or on your vet’s advice. If you do not have Vetadryl, you can also use Benadryl.

In general, many veterinarians don’t recommend giving animals OTC medications without first consulting with their vet. There could be side effects, interactions with other medications, or side effects that you might not even know about until it’s too late.

Best alternatives to Benadryl for dogs

Instead of using Benadryl for dogs, you can try one of the following:

  • Cetirizine (Zyrtec)
  • Fexofenadine (Allegra)
  • Loratadine (Claritin)
  • Clemastine (Tavegyl)
  • Chlorpheniramine (ChlorTrimeton)
  • Cyproheptadine (Periactin)
  • Hydroxyzine (Atarax)
  • Terfenadine (Seldane)
  • Trimeprazine (Temaril-P)

Conclusion of giving dogs Benadryl for allergies

Benadryl is one of the best over-the-counter medications for dogs and cats with allergies.

If you plan on using Benadryl on a regular basis, it is important to follow the dosage instructions provided by your veterinarian. However, if your dog is having an allergic reaction and you do not have access to the proper medication, you can give him Benadryl every 8 to 12 hours.

It is important to remember that while Benadryl can help with your dog’s allergies, it is not a cure. It may take some time before you notice any improvement in your dog’s symptoms. In addition, even after you notice an improvement, it is possible that your dog will still have some flare-ups from time to time.


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Hannah Elizabeth is an English animal behavior author, having written for several online publications. With a degree in Animal Behaviour and over a decade of practical animal husbandry experience, Hannah's articles cover everything from pet care to wildlife conservation. When she isn't creating content for blog posts, Hannah enjoys long walks with her Rottweiler cross Senna, reading fantasy novels and breeding aquarium shrimp.

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