Dosage Guide • FL · NY · VA • Reviewed by Dr. Tiffany Delacruz, DVM
Apoquel Dosage for a 100 lb Dog
oclacitinib · Janus kinase (JAK) inhibitor · Giant breed (100 lb / 45 kg)
What pet owners in Florida, New York, and Virginia need to know about Apoquel dosing for a 100 lb (Great Danes-sized) dog — written by a licensed vet, no specific dose given without an exam.
The dosing principle for Apoquel
Apoquel is dosed at approximately 0.4-0.6 mg/kg twice daily for the first 14 days, then once daily for maintenance. Apoquel tablets are available in fixed strengths (3.6 mg, 5.4 mg, 16 mg) — a vet selects the closest fit for your dog's weight.
Apoquel is highly weight-dependent because it comes in discrete tablet strengths. Using a tablet sized for a heavier dog risks immune suppression and side effects; using one too small leaves the dog itchy and uncomfortable. Vets calculate the closest fit and may combine tablet strengths to dial in the right dose.
Why 100 lb matters
A 100 lb (45 kg) dog falls into the giant category — typical examples include Great Danes, Mastiffs, Saint Bernards, and giant mixed breeds.
Giant breeds have unique drug-metabolism considerations — they're not simply 'big small dogs.' They often need proportionally lower doses per kg than smaller dogs. Anesthesia, NSAIDs, and sedatives all need experienced veterinary calibration. Bloat (GDV) risk also affects which oral medications can be used safely.
What Apoquel is approved for
- Pruritus (itching) caused by allergic dermatitis
- Atopic dermatitis in dogs at least 12 months old
What to watch for in your 100 lb dog
- GI upset — vomiting, diarrhea, or decreased appetite (uncommon)
- Lethargy in the first few days
- Worsening or new skin infections (rare — Apoquel mildly suppresses immune function)
- Increased tendency to develop demodex mange in young dogs
- Any new tumors or growths — bring up at every check-in
Get a Apoquel prescription or refill in your state
RexVet is licensed in Florida, New York, and Virginia. Our veterinarians can examine your 100 lb dog by video, calculate the right Apoquel dose for their specific situation, and either fill the prescription through our in-house pharmacy or send it to a local pharmacy near you.
Florida
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New York
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Virginia
Online vet care for VA pet owners — Virginia Beach, Richmond, Norfolk, Arlington, and 20+ VA cities.
Frequently asked questions
Frequently asked questions
How much Apoquel can I give my 100 lb dog?
Apoquel is dosed at approximately 0.4-0.6 mg/kg twice daily for the first 14 days, then once daily for maintenance. Apoquel tablets are available in fixed strengths (3.6 mg, 5.4 mg, 16 mg) — a vet selects the closest fit for your dog's weight. For a 100 lb (45 kg) dog, this gives a range that a licensed vet will narrow down based on the indication, your dog's age, kidney/liver function, and any other medications. RexVet vets serve Florida, New York, and Virginia and can calculate the right dose for your specific dog in a $64.99 video visit.
Is Apoquel safe for a giant dog like mine?
Apoquel (oclacitinib) is widely used in dogs in the 100 lb range, but "safe" depends on the specific dog, not just the weight. Giant breeds have unique drug-metabolism considerations — they're not simply 'big small dogs.' They often need proportionally lower doses per kg than smaller dogs. Anesthesia, NSAIDs, and sedatives all need experienced veterinary calibration. Bloat (GDV) risk also affects which oral medications can be used safely. A licensed vet will check your dog's history, current medications, and any underlying conditions before prescribing.
What should I watch for after giving my 100 lb dog Apoquel?
The most common things to watch for are: GI upset — vomiting, diarrhea, or decreased appetite (uncommon); Lethargy in the first few days; Worsening or new skin infections (rare — Apoquel mildly suppresses immune function). If you see anything concerning, contact a vet. For giant dogs specifically: Giant breeds have unique drug-metabolism considerations — they're not simply 'big small dogs.' They often need proportionally lower doses per kg than smaller dogs.
Can a RexVet online vet prescribe Apoquel for my 100 lb dog?
Yes — if your dog is in Florida, New York, or Virginia and the medical situation is appropriate. Apoquel is one of the medications RexVet's licensed veterinarians can prescribe via a $64.99 video visit. The vet will examine your dog by video, ask about history, and either prescribe Apoquel at the right dose for your dog's weight (100 lb) or recommend a different approach if needed.
Can I get a Apoquel refill in Florida, New York, or Virginia online?
Yes. RexVet is licensed in all three states and can refill Apoquel prescriptions for dogs already established on the medication. Refill visits are also $64.99. Prescriptions are filled through RexVet's in-house pharmacy (RexVetRx) or can be sent to your local pharmacy. Same-day delivery is available in most ZIP codes in FL, NY, and VA.
Apoquel dosing for other dog weights
Other medications dosed for a 100 lb dog
Sources
Last fact-checked: 2026-06-01. Reviewed by Dr. Tiffany Delacruz, DVM. RexVet (Rex Vets Inc.) is licensed in Florida, New York, and Virginia.
Get the right Apoquel dose for your 100 lb dog
Licensed RexVet veterinarians serving Florida, New York, and Virginia. $64.99 video visits, no membership required.