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Apoquel for Dogs: A Medication to Stop Allergies and Itchiness

Lauren Lee, BA, MAGhanasyam Bey, DVM
Written by Lauren Lee, BA, MA | Reviewed by Ghanasyam Bey, DVM
Updated on May 2, 2025

Key takeaways:

  • Apoquel (oclacitinib) is a medication used in dogs to manage itchiness caused by airborne allergens.

  • Apoquel works by disrupting the immune response that causes itching and inflammation.

  • Apoquel for dogs is a safe, long-term allergy treatment with few side effects. But it may increase your dog’s risk for skin infections.

A veterinarian examines a dog's fur using medical gloves.
razyph/iStock via Getty Images Plus

Canine seasonal allergies often cause skin-related symptoms and ear infections. These allergies are a challenge to manage, because they are a lifelong problem. And if seasonal allergies become a year-round condition, they can wreak havoc on your pup’s skin.

Unfortunately, you can’t always avoid the allergens that affect your dog. But newer medications, such as Apoquel (oclacitinib), can offer relief for dogs who have environmental allergies.

Apoquel for dogs at a glance

Common names

Apoquel (oclacitinib)

What it treats

Airborne allergies, itching 

How it comes (forms)

Tablets

Dosage

Based on a dog’s weight

Common side effects

Vomiting, diarrhea, decreased appetite, lethargy

Cost

$92 for 30 tablets

An infographic explaining Apoquel for dogs, including its alternative names, uses, dosage forms, administration guidelines, and common side effects.

What is Apoquel used for in dogs?

Apoquel is a dog allergy medication used to manage itchiness caused by airborne allergens (atopic dermatitis). Apoquel is currently FDA approved for dogs who are at least 1 year old.

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Apoquel may also effectively treat other skin conditions in dogs. But it has not been FDA approved to treat any other conditions. Using Apoquel for conditions other than allergic dermatitis in dogs is considered off-label use.

How does Apoquel for dogs work?

Apoquel works by disrupting a dog’s immune response before it can become severe and cause symptoms like itching. The medication suppresses the enzymes that cause itching, inflammation, and allergic reactions. This helps break the cycle of itching and scratching and allows your dog’s skin to heal. Without medication to prevent itching and scratching, your dog will constantly aggravate the affected skin. This can lead to worsening allergy symptoms and possibly infection.

Apoquel is as effective as steroid medications at treating itchiness related to allergies. But, unlike steroids, it has fewer potential side effects. Apoquel begins working 4 to 48 hours after it’s taken, and it provides long-term itch relief and reduced skin inflammation.

How do you give a dog Apoquel?

You give Apoquel to your dog by mouth as a tablet they swallow or a chewable tablet. Apoquel tablets are available in three doses:

  • 3.6 mg

  • 5.4 mg

  • 16 mg

You can give your dog Apoquel with or without food. But some dogs get an upset stomach if they take it without food. Wash your hands right after handling the medication.

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What is the typical Apoquel dosage for dogs?

Your veterinarian will provide you with the correct Apoquel dosage for your dog based on their weight. In general, the FDA-approved dosage of Apoquel for dogs is 0.18 mg to 0.27 mg per pound of body weight.

Most commonly, veterinarians recommend that dogs start by taking Apoquel twice daily for 14 days. Your vet may then slowly decrease your dog’s dosage for long-term use. The goal is to keep your dog on the lowest effective dosage. Many dogs take the medication for the rest of their lives.

What should you do if your dog misses a dose of Apoquel?

If you forget to give your dog a dose of Apoquel, skip the missed dose. Then, give your dog the medication at the next regularly scheduled time. And continue with their regular medication  schedule going forward. Never give your pet extra doses or two doses at one time. 

What are the side effects of Apoquel for dogs?

The most common side effects of Apoquel in dogs are:

Most dogs have few side effects from Apoquel. The side effects tend to be mild, and you can minimize them by giving your dog the medication with food.

What are the most serious risks of Apoquel for dogs?

Apoquel can increase the risk of your dog getting an infection. Specifically, research suggests Apoquel can make your dog prone to skin mites. And if your dog’s itching is caused by an infection, Apoquel can make their symptoms worse. 

Apoquel does not cause cancer. But it may increase the likelihood of new cancerous or noncancerous tumors in dogs who already have a history of cancer.

Frequently asked questions

Are Benadryl and Apoquel the same thing?

No, Benadryl (diphenhydramine) and Apoquel are not the same medications. Apoquel is a dog-specific medication that manages allergies. Benadryl is sometimes used to treat an allergic reaction in dogs. But Benadryl will not help your dog’s seasonal allergies.

How long can a dog stay on Apoquel?

Dogs can stay on Apoquel for years. In fact, many dogs with allergies take Apoquel for the rest of their lives to manage their symptoms.

The bottom line

Apoquel (oclacitinib) is a treatment for itchiness from airborne allergens in dogs. Apoquel targets allergic reactions before they take place. Your veterinarian will prescribe the correct dosage of Apoquel for your dog. 

Apoquel can be taken long term with few side effects. Just keep in mind that Apoquel may increase your dog’s risk for skin infections like mites. And Apoquel may not be the best option for dogs with a history of cancer, since it may increase the risk of tumors.

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Why trust our experts?

Lauren Lee, BA, MA
Lauren Lee, BA, MA, is a writer specializing in animal care and pet health content. Since she was a young child, her passions have been writing and anything to do with animals.
Renée Fabian, MA
Renée Fabian is the senior pet health editor at GoodRx. She’s worked for nearly 10 years as a journalist and editor across a wide range of health and well-being topics.
Ghanasyam Bey, DVM
Reviewed by:
Ghanasyam Bey, DVM
Ghanasyam Bey, DVM, is from Cleveland, Ohio, and attended Princeton University for undergraduate studies. After a year of biology research at Duke University, he attended Ohio State College of Veterinary Medicine.

References

Brooks, W. (2023). Oclacitinib maleate (Apoquel). Veterinary Partner. 

Burns, K. (2020). More itchy pets? No problem. American Veterinary Medical Association. 

View All References (6)

Fadok, V. A. (2014). Treating the itch: The importance of breaking the cycle. World Small Animal Veterinary Association World Congress Proceedings

Gadeyne, C., et al. (2014). Efficacy of oclacitinib (Apoquel) compared with prednisolone for the control of pruritus and clinical signs associated with allergic dermatitis in client-owned dogs in Australia. Veterinary Dermatology.

U.S. Food and Drug Administration. (2023). The ins and outs of extra-label drug use in animals: A resource for veterinarians

White, S. D., et al. (2018). Allergies in dogs. Merck Veterinary Manual. 

Zoetis. (2019). Apoquel - oclacitinib maleate tablet, coated [package insert]. FDA.report. 

Zoetis. (2020). Apoquel (oclacitinib tablet) [package insert].

GoodRx Health has strict sourcing policies and relies on primary sources such as medical organizations, governmental agencies, academic institutions, and peer-reviewed scientific journals. Learn more about how we ensure our content is accurate, thorough, and unbiased by reading our editorial guidelines.

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