Carprofen for Dogs with Kidney or Liver Disease
Published 2026-06-20 · Updated 2026-10-19
Kidney and liver health are the two biggest things your vet weighs before prescribing carprofen long-term. A dog with reduced kidney or liver function can sometimes still take it, but the dose, the bloodwork schedule and the alternatives all change. This guide explains what vets look at, what a rising liver enzyme on carprofen can mean, and the options if carprofen isn't suitable.
Why Kidney and Liver Function Matter
The liver breaks carprofen down, and most of it leaves the body in bile and stool, with a smaller share through the kidneys. Separately, all NSAIDs reduce the prostaglandins that help keep blood flowing to the kidneys when blood pressure or hydration drops. Healthy kidneys barely notice, but kidneys that are already struggling, or a dog that is dehydrated, under anesthesia or on diuretics, can be tipped into injury.
What Your Vet Checks
| Test | What it shows |
|---|---|
| Creatinine, BUN (urea), SDMA | Kidney filtering function. SDMA rises earlier than creatinine in early kidney disease. |
| Urine specific gravity, urine protein | Whether the kidneys can concentrate urine, and whether they are leaking protein. |
| ALT | Liver cell injury. A sharp rise after starting carprofen is the key warning sign. |
| ALP | Liver and bile flow, but also raised by steroids, some seizure drugs, bone growth, and many older dogs without liver disease. |
| Bilirubin, albumin | Liver function. Raised bilirubin or jaundice is an emergency on carprofen. |
| Blood pressure | High blood pressure often goes with kidney disease and changes the risk balance. |
My Dog's ALP Went Up After Starting Carprofen. Should I Stop?
Don't stop or continue on your own; call your vet, who will interpret the result alongside the others. As general background:
- A mild, isolated rise in ALP with a normal ALT, normal bilirubin and a dog that is eating and well is common in older dogs and has many causes. Vets often recheck in a few weeks rather than stop immediately.
- A rise in ALT (especially more than two to three times the upper limit), any rise in bilirubin, or signs such as vomiting, not eating or yellow gums suggests a true liver reaction. Carprofen is usually stopped and not restarted.
- Liver reactions to carprofen are rare and unpredictable, and most appear within the first few weeks. That is why a recheck two to four weeks after starting is common, and why Labrador Retrievers, which were over-represented in early reports, are often monitored carefully.
If carprofen is stopped, vets commonly switch to a non-NSAID approach such as Galliprant, gabapentin or Librela, sometimes with liver support such as SAMe while values return to normal.
Can a Dog With Kidney Disease Take Carprofen?
Sometimes. Vets follow kidney disease in stages (the IRIS system). In a dog with stable, early-stage disease, good hydration, normal blood pressure and serious arthritis pain, many vets will use carprofen at the lowest effective dose, with bloodwork every one to three months, because untreated pain also does harm. In more advanced disease, or a dog that is dehydrated, vomiting or not eating, NSAIDs are generally avoided. Signs to report straight away include a change in drinking or urination, reduced appetite, vomiting or weight loss.
Can a Dog With Liver Disease Take Carprofen?
A dog with active liver disease, a previous liver reaction to an NSAID, or early liver failure should not usually be given carprofen. Dogs with mild, stable, explained liver-enzyme changes (for example from a long-standing condition or another medicine) are sometimes treated with close monitoring. This is very much an individual decision.
If Your Dog Is Also on Heart or Blood Pressure Medicines
Furosemide, ACE inhibitors (enalapril, benazepril) and amlodipine are common in older dogs and all affect how the kidneys cope with an NSAID. See the table in our drug interactions guide.
Can I Decline the Blood Tests?
You can discuss it, and cost is a real concern. But bloodwork is how problems are caught before they cause signs, especially in the first month and in older dogs. Some vets will start with a smaller panel or a kidney-only test, or space tests out once a dog has been stable for a long time. Ask what the minimum safe plan is for your dog rather than skipping it entirely. See carprofen bloodwork monitoring.
Alternatives If Carprofen Isn't Appropriate
- Galliprant, which largely spares the kidneys and liver
- Librela, a monthly injection that does not depend on the kidneys or liver to clear it
- Gabapentin or amantadine for chronic pain
- Weight loss, controlled exercise, physiotherapy and joint supplements, which help every arthritic dog
See carprofen alternatives for more.
Frequently Asked Questions
Can a dog with mild kidney disease still take carprofen?
Sometimes, with more careful dosing and closer monitoring — this is an individualized decision your vet makes based on how stable and mild the condition is.
My dog's ALP went up on carprofen. Should I stop it?
Call your vet rather than deciding alone. A mild, isolated ALP rise with normal ALT and bilirubin in a dog that is eating well is common and often rechecked first. A rise in ALT or bilirubin, or vomiting, poor appetite or yellow gums, usually means stopping carprofen.
What bloodwork does my vet check before prescribing carprofen?
Typically BUN and creatinine for kidney function, and liver enzymes like ALT and ALP, sometimes alongside a urinalysis.