Galliprant for Cats: Safety and Dosing Questions
By Dr. Zubair Khalid, DVM, MS, PhD ·
Is Galliprant safe for cats? No. Galliprant (grapiprant) is FDA-approved for osteoarthritis pain in dogs, and it is not approved for use in cats. Giving a dog's Galliprant to your cat is unsafe and can cause serious harm.
This article is educational and is not a substitute for veterinary diagnosis or treatment.
Quick Answer
- Galliprant is not FDA-approved for cats, and no feline dose has been established for pet owners to use at home.
- The drug has been studied in cats only in controlled research and clinical trial settings, not as an at-home pain product [1][2][3].
- Never give your cat a tablet sized for a dog. Cats and dogs handle drugs differently, and the dose is not interchangeable.
- If your cat accidentally eats a Galliprant tablet, call your veterinarian or Pet Poison Helpline at (855) 764-7661 right away [4].
- If your cat needs pain relief, ask your veterinarian about an NSAID or other analgesic that is actually labeled for cats [4].
What Galliprant Is and What Veterinarians Use It For
Galliprant is the brand name for grapiprant. It belongs to the piprant class of nonsteroidal anti-inflammatory drugs (NSAIDs) [5]. The FDA approved it for treating osteoarthritis in dogs [5]. That approval covers dogs only.
NSAIDs reduce pain and inflammation. In people, common NSAIDs include ibuprofen and naproxen [4]. Those human products are not safe for cats and can be dangerous if a cat eats them [4]. The same caution applies to veterinary NSAIDs that are labeled for dogs.
So where does that leave cats? Some veterinary NSAIDs are made specifically for cats and are used to treat general pain and inflammation [4]. Galliprant is not one of them. It has no approved feline label, which means there is no manufacturer-backed dosing instruction, no approved safety profile, and no approved duration of use for cats.
That does not mean grapiprant has never been given to cats. It means every feline use is what veterinarians call extra-label, and it happens only under direct veterinary supervision, usually in a hospital or research setting.
How Grapiprant Works
Grapiprant blocks the prostaglandin E2 EP4 receptor [1]. Prostaglandins are chemicals the body releases during inflammation, and they contribute to pain. By blocking one specific receptor, grapiprant interrupts part of that pain signal.
This is different from older NSAIDs, which work by inhibiting cyclooxygenase enzymes. Because grapiprant does not inhibit cyclooxygenase, it may carry less risk of the stomach and kidney side effects tied to that pathway [5]. That is the theory behind the drug, and it is part of why it is attractive for long-term use in animals with chronic inflammatory conditions [5].
Here is the catch for cat owners. A gentler mechanism does not automatically make a drug safe in every species. Cats process many medications differently from dogs, and a drug can behave in unexpected ways even when the target receptor is the same.
Galliprant for Cats Dosage: Who Decides and How It Is Given
You should not decide a Galliprant dose for your cat. A veterinarian does, and only after examining your cat and weighing the risks.
What the research doses look like
In a 28-day safety study, healthy cats received grapiprant at 3, 9, or 15 mg/kg by mouth once daily [1]. In a pharmacokinetic study, cats received a single 2 mg/kg dose by mouth and by injection [2]. In a 2024 clinical trial, cats having surgery received 2 mg/kg by mouth before the procedure [3]. In a 2022 study, cats received 2 mg/kg, with one group dosed every 12 hours [6]. In a 2026 study, cats received roughly 3.8 to 4.2 mg/kg by mouth before surgery [7].
Notice what these numbers have in common. They come from research protocols with defined monitoring, not from a bottle you can use at home. They are not a dosing chart for pet owners, and they do not mean you can calculate a dose from your cat's weight.
How it is given
In these settings, grapiprant was given by mouth as a capsule or powder [1][2]. Some cats in the surgical studies also received other pain medications alongside it [7]. That combination approach matters. Pain control in cats often uses more than one drug, and a veterinarian chooses the mix.
Missed doses
If your veterinarian has prescribed any medication for your cat and you miss a dose, do not double up. Call your veterinary clinic and ask what to do. The same rule applies here. Guessing can push a cat into a toxic range.
Side Effects: Common and Serious
Cats can have a bad reaction to any NSAID, including a prescribed one [4]. Watch your cat closely after any new medication, and report changes right away.
| Side effect | How common or serious | What to do |
|---|---|---|
| Vomiting, diarrhea, or appetite loss | Possible with NSAID use, can signal stomach irritation [4] | Stop the medication and call your veterinarian |
| Lethargy or behavior change | Possible, and easy to miss in cats that hide illness [4] | Call your veterinarian the same day |
| Kidney or liver changes | Serious, which is why blood and urine testing is used in studies [1][6] | This is detected by your veterinarian, not at home |
| Bleeding or ulcers in the gut | Serious and potentially life-threatening [4] | Go to a veterinarian or emergency clinic now |
| Reaction after eating a dog tablet | Serious, because the dose may be far too high for a cat [4] | Call Pet Poison Helpline at (855) 764-7661 and your vet |
One practical point. Cats are good at hiding pain and nausea. If your cat seems "just a little off" after any new medicine, that is worth a phone call, not a wait-and-see.
If you are sorting through other at-home products for your cat, it helps to know which ones have real safety data. Our guides on CBD oil for cats and melatonin for cats cover two common questions owners ask.
Who Should Not Take It and What Interacts With It
No cat should take Galliprant as a home treatment, because it is not approved for cats at all. Beyond that, certain cats carry higher risk with any NSAID.
Cats with existing kidney disease, liver disease, stomach or intestinal ulcers, bleeding disorders, or dehydration are generally poor candidates for NSAIDs. Very young kittens, pregnant or nursing cats, and cats already on another NSAID also need extra caution. Your veterinarian weighs these factors before prescribing anything.
Drug interactions matter too. Giving two NSAIDs together, or combining an NSAID with a steroid, raises the risk of stomach ulcers and bleeding. If your cat takes any other medication or supplement, tell your veterinarian before starting a new pain drug. That includes common items like Benadryl and gabapentin, since sedation and other effects can stack.
Overdose: When to Call a Veterinarian or Poison Control
An overdose can happen even with a prescribed NSAID, and it can happen when a cat eats a dog's pill [4]. The signs of NSAID poisoning include vomiting, diarrhea, lethargy, loss of appetite, and more severe problems like stomach ulcers, kidney injury, and bleeding [4].
If you think your cat ate a Galliprant tablet, do not wait for symptoms. Call your veterinarian and Pet Poison Helpline at (855) 764-7661 for medical advice [4]. Have the tablet strength and an estimate of how many pills are missing ready.
A few habits prevent most of these calls. Keep all medication in a secure place your cat cannot reach [4]. Tell every family member about your cat's medication routine so no one double-doses or leaves a pill out [4]. If anyone in the household has questions about that routine, have them ask your veterinarian [4].
Limitations and When to Contact a Veterinarian
The honest limitation here is that the feline evidence for grapiprant is thin and comes from controlled settings, not from long-term home use. Even the researchers behind these studies call for more work [2]. That is a very different situation from a drug with an approved cat label and years of post-market safety data.
Use these timing rules.
Emergency now. Collapse, trouble breathing, repeated vomiting, bloody or black stool, a swollen or painful belly, pale gums, or a known pill ingestion. Go to an emergency clinic or call Pet Poison Helpline at (855) 764-7661 [4].
Same day. Your cat vomited after a new medication, stopped eating, seems painful when touched, or is hiding more than usual. Call your veterinarian today.
Routine visit. Your cat is limping, stiff, or slowing down, and you want to discuss pain options. Book an exam. Pain in cats is treatable, and there are feline-labeled choices [4].
Individual cases need a veterinarian who can examine your cat, run lab work, and pick a drug and dose for that specific animal.
Frequently Asked Questions
Is Galliprant safe for cats?
No, it is not approved for cats, so there is no established safe at-home use. It has been given to cats in research and clinical trials under supervision, but that is not the same as a safe product for your cat at home [1][3]. Treat any dog-labeled Galliprant as off-limits for your cat.
Can I give my cat my dog's Galliprant?
No. A dog's tablet is sized for a dog, and giving it to a cat can cause an overdose [4]. If your cat eats one by accident, call your veterinarian and Pet Poison Helpline at (855) 764-7661 right away [4].
Does grapiprant work for pain in cats?
Early feline research suggests it may relieve post-surgical pain at doses used in those studies, and one trial found it comparable to another NSAID for that purpose [3]. Even so, those results come from monitored surgical settings, not from home use. Ask your veterinarian whether it is appropriate for your cat and what monitoring is needed.
What can I give my cat for pain instead?
Ask your veterinarian about an NSAID that is made for cats, since those are used to treat general pain and inflammation in this species [4]. Never reach for a human NSAID like ibuprofen or naproxen, because those are dangerous for cats [4]. Your veterinarian can also discuss other pain-control options based on your cat's health.
What are the signs of an NSAID overdose in a cat?
Vomiting, diarrhea, lethargy, and appetite loss are common early signs, and serious cases can involve ulcers, kidney problems, and bleeding [4]. Signs can worsen quickly if the dose is high [4]. Call your veterinarian and Pet Poison Helpline at (855) 764-7661 without waiting for symptoms to progress [4].
Related Articles
- CBD Oil for Cats: Feline Safety Profile and THC Toxicity
- Can I Give My Cat Melatonin? Safety, Dosage, and When to Avoid It
- Can You Give Your Cat Benadryl? Dosage and Safety Guide
- Can Cats Eat Catnip? Nepetalactone and Safe Use Guide
- Gabapentin For Cats
- Cat Flea Treatment Safe For Cats
- Griseofulvin for Cats: Dosage and Safety
- Diazepam for Cats: Dosage, Uses, and Safety
- Entyce for Cats: Dose, Uses, and Safety Explained
References
- Safety and toxicokinetic profiles associated with daily oral administration of grapiprant, a selective antagonist of the prostaglandin E2 EP4 receptor, to cats. American journal of veterinary research, 2016.
- Pharmacokinetics of grapiprant, a selective EP4 prostaglandin PGE2 receptor antagonist, after 2 mg/kg oral and i.v. administrations in cats. Journal of veterinary pharmacology and therapeutics, 2017.
- Evaluation of the analgesic efficacy of grapiprant compared with robenacoxib in cats undergoing elective ovariohysterectomy in a prospective, randomized, masked, non-inferiority clinical trial. Journal of feline medicine and surgery, 2024.
- Nsaids for Cats. Pet Poison Helpline.
- Single-Dose Pharmacokinetics of Grapiprant in Rhesus Macaques (Macaca mulatta). Journal of the American Association for Laboratory Animal Science : JAALAS, 2025.
- Grapiprant or carprofen following ovariohysterectomy in the cat: analgesic efficacy, hematological, biochemical and urinalysis evaluation. Journal of feline medicine and surgery, 2022.
- Efficacy of combined grapiprant and tapentadol for analgesia in cats undergoing elective ovariohysterectomy. Journal of feline medicine and surgery, 2026.