Galliprant vs Carprofen: Safety, Strength & Switching

Published 2026-04-19 · Updated 2026-10-19

Galliprant (grapiprant) and carprofen are both daily tablets for arthritis pain in dogs, but they work differently. Carprofen is a traditional NSAID. Galliprant is a newer "piprant" that blocks only one prostaglandin receptor. Neither is better for every dog. Here is how they compare on effectiveness, stomach, liver and kidney safety, cost, and how to switch between them.

At a Glance

How They Work

Prostaglandins drive pain and inflammation in arthritic joints, but they also protect the stomach lining and help keep blood flowing to the kidneys. Carprofen lowers prostaglandin production broadly, which is effective but also removes some of that protection. Galliprant leaves prostaglandin production alone and blocks only the EP4 receptor, the one most involved in osteoarthritis pain. The idea is to relieve arthritis pain while leaving the protective roles alone. In practice that gives Galliprant a lower theoretical risk to the stomach, liver and kidneys, though it can still cause vomiting and diarrhea.

Is Galliprant Stronger Than Carprofen?

Not as a rule. Both reduced arthritis pain compared with placebo in their approval studies, but they have rarely been compared directly, and individual dogs vary a lot. Vets commonly report that some dogs do better on a traditional NSAID and others on Galliprant. If one isn't giving enough relief after two to four weeks, trying the other (after the appropriate gap) is reasonable. For pain after surgery, carprofen is the approved option; Galliprant is not labelled for it.

Liver and Kidneys: Which Is Safer?

Carprofen carries a small, unpredictable risk of liver reaction in the first weeks, and, like all NSAIDs, a kidney risk that rises with dehydration, kidney disease or heart medicines. Galliprant's mechanism should largely spare the kidneys and liver, which is why vets often consider it for:

• dogs whose liver enzymes rose on carprofen (see carprofen with kidney or liver disease)
• dogs with stable early kidney disease
• dogs that had stomach upset on NSAIDs

Galliprant still needs to be used with care in dogs with significant liver, kidney or heart disease, because its safety in those groups was not specifically tested. Your vet will usually still want baseline bloodwork.

Switching From Galliprant to Carprofen (or Back)

Don't give the two together. When switching, your vet will tell you whether to leave a gap. Galliprant clears from the body within a day or so, and some vets use a gap of one to two days; others prefer longer, especially when moving onto an NSAID in a dog with a sensitive stomach. Moving from carprofen to Galliprant, vets often allow a few days for carprofen to clear. Watch your dog closely for a few days after any switch: appetite, stool and energy level. More on gaps in our drug interactions guide.

Cost

Carprofen is available from several generic makers (see generic carprofen brands) and is usually the cheaper option per month, often by a wide margin for large dogs. Galliprant is a single-brand product. Cost is a reasonable thing to raise with your vet, because a medicine you can keep giving every day matters more than a small theoretical edge.

Which One Is Right for Your Dog?

• Carprofen often makes sense for an otherwise healthy dog, after surgery, or when cost matters for long-term use.
• Galliprant often makes sense for dogs that had stomach upset or raised liver values on an NSAID, older dogs with borderline kidney values, or when a vet wants to minimise NSAID risks.
• Neither alone: many dogs do best on a combination such as gabapentin, weight loss, exercise changes, physiotherapy or Librela alongside one daily tablet. See carprofen alternatives.