Apoquel for Dogs: Dosage Guide, Side Effects & How It Compares to

Everything Dog Owners Need to Know About Apoquel

If your dog is constantly scratching, licking their paws, or chewing at red, irritated skin, chances are your vet has mentioned Apoquel. It’s the most widely prescribed oral allergy medication for dogs — but how does it actually work, is it safe long-term, and how does it compare to alternatives like Cytopoint, steroids, and Benadryl?

This guide covers everything you need to know.

What is Apoquel?

Apoquel is the brand name for oclacitinib maleate, manufactured by Zoetis. It’s a Janus kinase (JAK) inhibitor — a targeted medication that blocks specific enzymes (JAK1 and JAK3) involved in transmitting itch and inflammation signals in your dog’s body.

When a dog has an allergic reaction, their immune system releases cytokines (chemical messengers) including IL-31, the primary “itch cytokine.” Apoquel blocks the pathway these cytokines use to signal the brain and skin cells, effectively switching off the itch at its source.

This is fundamentally different from steroids (which broadly suppress the entire immune system) or antihistamines (which block histamine, only one of many itch mediators in dogs).

You can buy Apoquel online at PetShopBoss.com with worldwide shipping.

What Does Apoquel Treat?

Apoquel is FDA-approved for the control of itch (pruritus) associated with:

Atopic dermatitis — allergies to environmental triggers like pollen, dust mites, and mould spores
Allergic dermatitis — including flea allergy dermatitis, food allergy-related itch, and contact allergies

It’s approved for dogs 12 months of age and older.

How Fast Does Apoquel Work?

This is one of Apoquel’s biggest advantages:

4 hours: Begins relieving itch
24 hours: Effectively controls allergic itch

For comparison, cyclosporine (Atopica) can take 4–6 weeks to reach full effect, and even Cytopoint injections take about 24 hours to start working.

Apoquel Dosage by Dog Weight

The standard dose is 0.4–0.6 mg oclacitinib per kg body weight.

Apoquel comes in three tablet strengths: 3.6mg, 5.4mg, and 16mg.

Dosing Protocol

Days 1–14 (loading): Give the appropriate dose twice daily
Day 15 onwards (maintenance): Give the same dose once daily

Apoquel Dosage Chart

Dog Weight	Weight (lbs)	Tablet	Per Dose
3.0–4.4 kg	6.6–9.9 lbs	3.6 mg	1 tablet
4.5–5.9 kg	10–14.9 lbs	5.4 mg	½ tablet
6.0–8.9 kg	15–19.9 lbs	5.4 mg	1 tablet
9.0–13.4 kg	20–29.9 lbs	5.4 mg	1½ tablets
13.5–19.9 kg	30–44 lbs	16 mg	½ tablet
20.0–26.9 kg	45–60 lbs	16 mg	½ tablet
27.0–39.9 kg	60–90 lbs	16 mg	1 tablet
40.0–54.9 kg	90–120 lbs	16 mg	1½ tablets
55.0–80.0 kg	120–175 lbs	16 mg	2 tablets

Apoquel can be given with or without food. Tablets are scored for easy splitting.

Apoquel Side Effects in Dogs

Apoquel is generally well tolerated. In clinical trials, the most commonly reported side effects were:

Vomiting and diarrhoea — the most common, usually mild and self-resolving
Decreased appetite
Lethargy
Ear infections (otitis)
New skin lumps — both benign and malignant growths have been reported in post-market surveillance
Increased susceptibility to infections — including demodicosis (demodex mange) and bacterial skin infections

Most side effects are mild and resolve without stopping treatment. However, because Apoquel modulates part of the immune system, dogs on long-term therapy should have regular veterinary check-ups. Report any new lumps, persistent infections, or unusual lethargy to your vet.

Apoquel vs Cytopoint vs Steroids — Which is Best?

This is the question most dog owners ask. Here’s an honest comparison:

Apoquel (Oclacitinib)

Oral tablet, given daily
Works in 4 hours
Safe for long-term use
Not a steroid
Owner can administer at home
Small risk of increased infections and neoplasia with long-term use

Cytopoint (Lokivetmab)

Monthly injection given at the vet clinic
Works within 24 hours
Targets only IL-31 (the itch cytokine) with a monoclonal antibody
Excellent safety profile — does not suppress the immune system
Requires monthly vet visits
More expensive per month in most cases

Steroids (Prednisolone/Prednisone)

Cheap and fast-acting
Broadly suppresses the immune system
Significant side effects with long-term use: increased thirst, urination, weight gain, muscle wasting, diabetes risk, weakened immune system
Best used only for short-term flare-ups

Antihistamines (Benadryl/Piriton)

Available over the counter
Limited effectiveness in dogs — histamine is only one of many itch mediators
Often causes drowsiness
May work for mild seasonal allergies but rarely sufficient for moderate-to-severe itch

For most dogs with moderate to severe allergic itch, Apoquel or Cytopoint are the current best options. The choice often comes down to whether you prefer a daily tablet at home (Apoquel) or a monthly injection at the vet (Cytopoint).

Important Safety Information

Apoquel is for dogs only — never use in cats or other animals
Only for dogs 12 months of age and older
Do not use in dogs with serious infections
Do not use in breeding, pregnant, or lactating dogs
Not evaluated with corticosteroids or cyclosporine — avoid combining these
Dogs should be monitored for signs of infection, demodicosis, and new skin growths

Where to Buy Apoquel Online

You can purchase genuine Zoetis Apoquel tablets from PetShopBoss.com with worldwide delivery:

Always consult your veterinarian before starting Apoquel to confirm it is appropriate for your dog’s condition and age.

Apoquel for Dogs: Dosage Guide, Side Effects & How It Compares to Cytopoint and Steroids