Dosage Guide • FL · NY · VA • Reviewed by Dr. Tiffany Delacruz, DVM
Carprofen Dosage for a 100 lb Dog
carprofen · Non-steroidal anti-inflammatory drug (NSAID) · Giant breed (100 lb / 45 kg)
What pet owners in Florida, New York, and Virginia need to know about Carprofen 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 Carprofen
The FDA-labeled dose for carprofen in dogs is approximately 2 mg per pound (4.4 mg/kg) total per day, given as a single dose or split into two doses 12 hours apart.
Carprofen is metabolized by the liver and cleared by the kidneys. Dosing above the labeled range or in a dog with subclinical kidney or liver disease can cause GI ulceration, acute kidney injury, or liver damage. The right dose for your specific dog accounts for weight, age, organ function (verified by bloodwork), and concurrent medications — especially other NSAIDs, steroids, or ACE inhibitors.
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 Carprofen is approved for
- Pain and inflammation from osteoarthritis
- Post-surgical pain control
- Soft-tissue and orthopedic pain
What to watch for in your 100 lb dog
- Decreased appetite, vomiting, or diarrhea — call your vet same day
- Black, tarry, or bloody stool (possible GI ulceration — urgent)
- Yellow gums or eyes (possible liver issue — urgent)
- Increased thirst or urination (possible kidney involvement)
- Lethargy that's new or worsening
Get a Carprofen 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 Carprofen 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 Carprofen can I give my 100 lb dog?
The FDA-labeled dose for carprofen in dogs is approximately 2 mg per pound (4.4 mg/kg) total per day, given as a single dose or split into two doses 12 hours apart. 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 Carprofen safe for a giant dog like mine?
Carprofen (carprofen) 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 Carprofen?
The most common things to watch for are: Decreased appetite, vomiting, or diarrhea — call your vet same day; Black, tarry, or bloody stool (possible GI ulceration — urgent); Yellow gums or eyes (possible liver issue — urgent). 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 Carprofen for my 100 lb dog?
Yes — if your dog is in Florida, New York, or Virginia and the medical situation is appropriate. Carprofen 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 Carprofen at the right dose for your dog's weight (100 lb) or recommend a different approach if needed.
Can I get a Carprofen refill in Florida, New York, or Virginia online?
Yes. RexVet is licensed in all three states and can refill Carprofen 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.
Carprofen 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 Carprofen dose for your 100 lb dog
Licensed RexVet veterinarians serving Florida, New York, and Virginia. $64.99 video visits, no membership required.