Get

In Your Inbox

Dogster is reader-supported. When you buy via links on our site, we may earn an affiliate commission at no cost to you. Learn more.

Can Dogs Take Antihistamines? Vet-Verified Safety Facts

blister packs of cetrizine antihistamine tablets

Dogs and humans react to environmental allergies differently. Common symptoms for humans include runny noses and sneezing, but dogs do not tend to suffer from these responses. Instead, they are more likely to have red or itchy skin, hair loss, and red eyes. Because people sometimes take allergy medications, including antihistamines, you may wonder if dogs can do the same. In short, it’s often not the most useful treatment for dogs. Read on to learn more.

divider dog paws 4 oct 2024

What Are Antihistamines?

When the human body detects an allergen or infection, certain cells release histamine. This histamine causes allergy symptoms like a runny nose, sneezing, coughing, and wheezing. Antihistamines inhibit the production of histamines which helps combat or reduce the symptoms associated with allergic reactions. However, once an allergic reaction has started, antihistamines are no longer effective at stopping the inflammation that has been triggered.

antihistamine tablets
Image Credit: Sonis Photography, Shutterstock

Antihistamines for Dogs

Theoretically, dogs may benefit from antihistamines in similar ways to people. However, there are no specific antihistamines that are licensed for dogs, which means that giving the medication is considered off-label usage. Therefore, it must be prescribed by a veterinarian, to ensure it is appropriate for the dog, and to determine dosing. However, often vets will elect other medications that work better for allergies and can suppress the inflammation once it has already started.

Speak to a Vet

As stated previously, before giving antihistamines to your dog, you should speak to your vet. They will advise whether it is the best option, and they will also be able to determine the best dosage for your dog. Inform your vet of any medications, herbal treatments, and supplements your dog is taking and they will be able to advise of any possible drug interactions that might prevent the use of antihistamines, too.

Did you know you can talk to a vet online? Click on the image or button below to schedule a call: PangoVet_Mention-in-Content Savings V1


divider dog paws 4 oct 2024

The 4 Alternative Canine Allergy Treatments

While antihistamines can work in some cases, they won’t work on all dogs for all allergies. There are alternative solutions to help combat the nasty symptoms associated with allergies in dogs.

1. Identify the Source

Try to identify what your dog is allergic to. This can be a specific food or something in the environment. If you suspect environmental allergies, look for plants or anything your dog might come into contact with while in the house, out in the yard, or while out walking.

Some plants cause reactions when your dog brushes up against them and identifying this as the cause of a reaction will help you overcome the problem. Alternatively, you might need to speak to a vet who will be able to help identify the likely cause.

shiba inu dog scratching its ear
Image Credit: MitchyPQ, Shutterstock

2. Elimination

Once you have identified what is causing the allergic reaction, look for ways to eliminate allergens from your dog’s life. If it is a particular perfume, swap it out for another. Similarly, if your dog is allergic to its shampoo, you might need to find an alternative. If it is coming into contact with an allergen while outside, you can try a different route or get rid of the plant in your garden.


3. Symptom Relief

Common allergic skin reactions in dogs are red skin and itchiness. Use a natural shampoo and bathe your dog. Not only will the natural shampoo help relieve itching and potentially enable your dog a little respite from the scratching, but bathing can also get rid of any allergens in the coat and prevent your dog from continuing to come into contact with whatever is causing the itching.


4. Nutritional Therapy

Some foods are labeled as being anti-allergy foods. They might not combat the allergy, but they can help relieve the symptoms and make your dog feel better.

divider dog paws 4 oct 2024

Frequently Asked Questions (FAQ)

How Quickly Do Antihistamines Work?

The speed at which antihistamines work on dogs depends on the actual drug used as well as the severity of the reaction and how much of the drug is administered. Frequently it will take a day or two to see any changes, so ask your vet what to expect.

Do Antihistamines Make Dogs Sleepy?

Antihistamines can potentially make some dogs sleepy, though this depends on the type and the dosage. Dogs generally don’t seem to be as affected as humans, in this regard. If your dog becomes lethargic, you should consult your vet so they can advise on the next steps.

Senior Golden Retriever feeeling sick resting on a dog bed
Image Credit: Yobab, Shutterstock

Dogster_Website dividers_v1_Jan 18 2024-01-TEST

Conclusion

Antihistamines bring relief to human allergy sufferers around the world. They can also, in some cases, be a potential therapy for dogs that are suffering allergic reactions, too, though many other, more effective treatments are often preferred.

If you think your dog may benefit from an antihistamine, speak to your vet to get their recommendation. Some antihistamines are not safe to give to dogs. And a vet will know whether any known drug interactions might cause a bad reaction.

Finally, they will also be able to advise on suitable dosage levels to yield results without causing any potential negative reactions in your dog.


Featured Image Credit: MDV Edwards, Shutterstock

Want content like this delivered to you?

Sign Up For Our Newsletter

News, insights, expert advice, and everything dog

* By submitting, you agree to our Terms & Conditions and Privacy & Cookies Policy.

How useful was this post?

Click on a star to rate (you can leave written feedback after clicking submit)

Help us improve Dogster for pet parents!

Your feedback really matters.

What did you like about this post? Also how can we improve it?

Join the conversation

Leave a Reply

You’re very welcome to leave a comment or question. Please know that all comments must meet our community guidelines, and your email address will NOT be published. Let’s have a positive and constructive conversation.

Talk With A Vet Online

Peace of mind,
anywhere, anytime

Affordable vet advice

Why Is My Dog Coughing a Lot? 11 Vet-Verified Reasons

It can be disconcerting when your dog starts to show signs of illness, and coughing can be especially stressful. Coughing can be uncomfortable...

What Clothing Lines Have a Dog as Part of Their Logo? 6 Biggest Brands

For any business, branding is very important. Clothing lines have pulled inspiration for their logo and branding from many places, including from our...

How to Start a Dog Daycare Business (2025 Guide) – 7 Simple Steps

The pet industry is currently following an upward trajectory, and its compounded annual growth rate is projected to expand at 6.8% from 2022...

How to Make Chicken Jerky for Dogs: Vet Approved Recipe & Tips

Chicken jerky is a delicious treat for your dog. Most dogs love chicken, and it’s often found in dog foods. Some dogs may...

More related

6 Cool Off-Leash Dog Parks in Tallahassee, FL (2025 Update)

Tallahassee is the state capital of Florida, and it’s a city nestled among a lot of nature. There are miles of trails, heavy...

103 Baseball Dog Names Inspired by Major League

Naming your new dog can be incredibly fun, and if you’re a baseball fan, giving your pet a name inspired by one of...

Are Pet Owners More Empathetic Than Other People? What Science Says

We’ve all heard the claims that pet owners are more loving and empathetic than non-pet owners. Not only are they supposed to be...

10 Interesting Canada Dog-Walking Statistics to Know in 2025

Note: This article’s statistics come from third-party sources and do not represent the opinions of this website. One question that a potential dog...

Keep reading

Is Lamb Dog Food Good for Dogs? Vet-Reviewed Benefits & FAQ

There are a host of dog foods out there to choose from when it comes to feeding your dog and many different meat options available to tempt your pet’s palate. While a good majority of dog foods will contain chicken,...

dachshund dog eating from elevated bowl

Blue Buffalo Puppy Food Review 2025: Pros, Cons, Recalls & FAQ

Blue Buffalo Puppy Food comes in various flavors and recipes and is manufactured by Blue Buffalo, one of the first brands to prioritize using whole food, “premium” ingredients. Founded initially as a small family company in 2003, the success of...

Dogster_Blue Buffalo Puppy Food Review

Dog Feeding Schedule for Puppies, Adults & Senior Dogs (Vet Approved)

In addition to determining how much to feed your dog, establishing a feeding schedule can also be very beneficial. This means feeding your dog at roughly the same time every day, according to how many meals they need and how...

golden retriever dog eating healthy dry food from bowl at home

5 Best Cranberry Supplements for Dogs in 2025 – Reviews & Top Picks

Have you been hunting for the ideal cranberry supplement for your furry companion? You have several options, but we have reviews of the five best cranberry supplements for your dog. Before selecting a product, it’s best to contact a veterinarian...

woman giving old dog a treat

Can Dogs Eat Deer Meat? Vet-Verified Nutrition Facts & Risks

The short answer to this question is yes, dogs can eat deer meat, also known as venison. It’s fairly similar to other types of meat, such as beef. Dogs are facultative carnivores, which means they prefer meat, they do best...

Can Dogs Eat Deer Meat

Benefits of Goat’s Milk for Dogs: 5 Incredible Health Perks

Every proud dog owner knows the key to a healthy and happy pup is a balanced and nutritious diet. One lesser-known but great dietary option for your furry friend is goat’s milk. Goat’s milk is incredibly nutritious for dogs and...

Goat's milk

Is Spicy Food Bad for Dogs? Vet-Verified Nutrition Facts & Advice

While dogs can enjoy many of the same foods as humans, they should not eat spicy food. Although most spicy food isn’t toxic to dogs, it can still lead to negative consequences. So, it’s best to avoid giving any to...

spicy grilled chicken

Can Dogs Eat Chicken Gizzards? Vet-Verified Facts & FAQ

Dogs can eat chicken, but can dogs eat chicken gizzards? Yes, you can feed your dog chicken gizzards! Of course, as with any food, there are potential risks to feeding your dog chicken gizzards. However, these risks can be largely...

Can Dogs Eat Chicken Gizzards