Carprofen for Pets

Carprofen is a veterinary nonsteroidal anti-inflammatory drug (NSAID) used mainly to reduce pain and inflammation. It is FDA-approved for dogs, and in cats it may sometimes be used only under a veterinarian’s specific guidance.

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Quick Facts About Carprofen

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Drug class

Nonsteroidal anti-inflammatory drug (NSAID) of the propionic acid class.

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Common brand names

Rimadyl and multiple veterinary generic products.

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Forms

Commonly available as chewable tablets, caplets/tablets, and veterinary injection.

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Species approved for

FDA-approved for dogs; use in cats may be extra-label and should only be directed by a veterinarian.

What Carprofen Is Used For

Carprofen is used to help manage pain and inflammation, especially in dogs with osteoarthritis or after soft-tissue or orthopedic surgery. As an NSAID, it works by reducing inflammatory pathways that contribute to pain, swelling, and stiffness. Veterinarians may also use it in other situations when they judge that an anti-inflammatory pain reliever is appropriate. In cats, carprofen is not a routine at-home medication and should only be used if your veterinarian specifically prescribes it.

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Side Effects to Watch For

Many pets tolerate carprofen well, but side effects can happen with any NSAID. Stop the medication and call your veterinarian if you notice concerning changes.

Common side effects may include vomiting, diarrhea, decreased appetite, or mild lethargy.
Some pets may show stomach upset, softer stools, or reluctance to eat.
More serious problems can include stomach or intestinal ulceration, black or bloody stool, vomiting blood, marked weakness, or abdominal pain.
Liver-related problems may cause poor appetite, vomiting, lethargy, or yellowing of the gums, skin, or whites of the eyes.
Kidney-related problems may cause increased thirst, changes in urination, dehydration, or worsening lethargy.
Rare allergic or hypersensitivity reactions can include facial swelling, hives, or trouble breathing.

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Dosing & Administration

Always follow your vet's instructions. Give carprofen exactly as prescribed and do not change the amount, frequency, or duration on your own. Many veterinarians recommend giving oral carprofen with food to help reduce stomach upset. Do not combine carprofen with other NSAIDs, aspirin, or corticosteroids unless your veterinarian specifically tells you to. Tell your vet about all other medications, supplements, liver or kidney concerns, stomach ulcer history, bleeding disorders, or previous NSAID reactions before your pet starts this medication. If your pet is on long-term therapy, your veterinarian may recommend bloodwork monitoring.

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When to Call a Vet

Emergency

Go to the ER now

● Trouble breathing, facial swelling, hives, collapse, or other signs of an allergic reaction.
● Possible overdose, chewed bottle, or your pet got into another pet’s medication.
● Vomiting blood, black or tarry stool, severe weakness, seizures, or collapse.
● Sudden refusal to eat with repeated vomiting or signs of severe abdominal pain.

Urgent

See a vet within 24 hours

● Vomiting or diarrhea that continues or keeps coming back.
● Marked decrease in appetite, unusual tiredness, or behavior changes after starting carprofen.
● Increased thirst or urination, or urinating much less than usual.
● Yellowing of the eyes, gums, or skin.

Monitor

Watch at home, call if it worsens

● A single mild episode of stomach upset after a dose.
● Temporary softer stool or mild decrease in appetite if your pet otherwise seems normal.
● If mild signs do not quickly improve, call your vet for advice before giving the next dose.

Common Questions About Carprofen

Can I give my dog human pain medicine instead of carprofen?

No. Human pain medicines such as ibuprofen, naproxen, and acetaminophen can be dangerous or even deadly to pets. Only give pain medication that your veterinarian has specifically prescribed for your pet.

What happens if I miss a dose?

Call your veterinarian for instructions. In general, if you remember relatively soon, your vet may advise giving it when remembered. If it is almost time for the next dose, they may advise skipping the missed dose. Do not double up unless your veterinarian tells you to.

Can my cat take carprofen?

Sometimes, but only under direct veterinary supervision. Carprofen is FDA-approved for dogs, not for routine at-home use in cats. Because cats can be more sensitive to some NSAIDs, never give your cat carprofen unless your veterinarian specifically prescribes it.

Should carprofen be given with food?

Many veterinarians recommend giving oral carprofen with food to help reduce stomach upset. Follow the label and your veterinarian’s instructions for your pet’s specific product.

How common are side effects with carprofen?

Adverse events are considered uncommon, but they can still be serious when they occur. Merck Veterinary Manual notes reported adverse events with carprofen have been comparable to other NSAIDs, at about 2 events per 1,000 dogs treated. Because individual pets vary, contact your veterinarian promptly if you notice vomiting, diarrhea, poor appetite, lethargy, yellowing, or changes in drinking or urination.

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Disclaimer: The information provided in this article is for educational purposes only and does not constitute veterinary medical advice. Reading this content does not establish a veterinarian-client-patient relationship. Every pet is different — always consult a licensed veterinarian before making decisions about your pet's health, diet, or care. If you'd like personalized guidance, you can talk to one of our vets. If your pet is experiencing a medical emergency, contact your local emergency animal hospital immediately.

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