The best arthritis medicine for dogs is the one your veterinarian matches to your individual dog, because no single drug is ideal for every dog’s age, kidney and liver health, other medications and pain level. Prescription options with the strongest evidence are the veterinary NSAIDs (such as carprofen, meloxicam and grapiprant) and the monthly anti-nerve growth factor antibody bedinvetmab, usually combined with weight control and exercise changes. Over-the-counter human pain relievers are not safe substitutes.
Quick answer
Quick answer: There is no universal “best” arthritis medicine for dogs. Veterinary guidelines favor a multimodal plan: a prescribed pain-control drug when needed, weight management, controlled exercise and home adjustments. Prescription NSAIDs and the anti-NGF antibody bedinvetmab have the best-documented pain effects in clinical trials. Omega-3 fatty acids have moderate supportive evidence, while glucosamine and chondroitin showed little benefit in one major meta-analysis. Never give human pain relievers. Your vet chooses and monitors the drug.
This guide is a decision aid, not a prescribing list. For a companion overview of how the common drugs are used day to day, see our guide to dog arthritis medicine.
Why does “best” depend on the individual dog?
Canine osteoarthritis is a long-term condition, and the same drug can look excellent in one dog and poorly suited to another. The Merck Veterinary Manual describes NSAIDs as “the most predictably effective treatment for OA,” yet an NSAID is only appropriate if a dog’s liver, kidneys and digestive tract can handle it. The same page notes that bedinvetmab is useful in dogs with moderate to severe signs and that use in mild cases remains controversial.
Four patient factors usually steer the choice:
- Organ health. Kidney disease, liver disease, dehydration or a history of stomach and intestinal problems change the risk profile of NSAIDs, according to the FDA’s consumer guidance.
- Other medications. The FDA advises against combining two NSAIDs, or an NSAID with a steroid such as prednisone.
- Severity and stage. Merck notes that treatment decisions should rely on clinical signs rather than radiographs, using owner-completed pain scales and staging systems.
- Practical life factors. Daily tablets versus a monthly clinic injection, cost, a dog that refuses pills, and whether the owner can attend regular recheck visits.
The 2022 AAHA pain management guidelines support the same logic. They describe a tiered, multimodal approach that prioritizes the most efficacious modalities and stresses proactive rather than reactive pain management, with owner assessment of the dog’s pain as part of the process.
What prescription options do vets compare?
What are the veterinary NSAIDs?
Several non-steroidal anti-inflammatory drugs are FDA-approved for dogs, all by prescription. The FDA lists carprofen, deracoxib, firocoxib, grapiprant, meloxicam and robenacoxib as approved options. Robenacoxib is approved only for soft tissue surgery and for no more than three days, and grapiprant is approved only for osteoarthritis, according to the FDA page.
Grapiprant works differently from the others. It blocks a prostaglandin receptor (EP4) instead of the COX enzymes, which is why some vets consider it for dogs where classic NSAIDs are a concern. In the multisite placebo-controlled trial by Rausch-Derra and colleagues (285 dogs enrolled), owner-rated treatment success on day 28 was 48.1% with grapiprant versus 31.3% with placebo, and vomiting occurred in 17.02% of treated dogs versus 6.25% on placebo. The trial was run by the drug’s developer, which is worth remembering when reading the “well tolerated” conclusion.
The practical takeaway: the NSAID class has the longest track record, but each member has its own label, and “which one” is a prescriber decision based on your dog’s history.
What is the anti-NGF monoclonal antibody?
Bedinvetmab (brand name Librela) is a canine antibody that binds nerve growth factor. Merck explains that anti-NGF antibodies target neurogenic inflammation and peripheral sensitization, a different mechanism from NSAIDs, and reports no known interaction between the two classes. It is given as a subcutaneous injection about every 30 days, according to Merck. Merck also lists injection-site reactions, increased thirst and urination, and rare systemic reactions as potential adverse events from pharmacovigilance data, and notes that in Canada neurological disease has been reported although causation remains uncertain.
A 2025 open-label randomized trial in Frontiers in Veterinary Science compared it with daily oral meloxicam in 101 dogs. Both groups improved significantly from baseline on the Canine Orthopaedic Index; the antibody group’s larger average improvement was not statistically significant. The authors reported four adverse events in the bedinvetmab group and 17 in the meloxicam group, nine of which were gastrointestinal, and more bedinvetmab dogs completed the study (44 versus 33). Two caveats matter: the trial was open-label (owners and vets knew which drug was used), and the study disclosed funding from a contract with the drug’s manufacturer. Because the study was relatively small, it does not replace long-term safety monitoring in everyday practice.
What are adjunct drugs, and do they work?
Adjuncts are added when an NSAID or antibody alone is not enough or cannot be used. Merck covers these:
- Gabapentin and pregabalin are listed among options that can be considered for dogs with moderate to severe disease (COAST stages 3 to 4). Merck states that data on these other pain-modifying drugs in dogs and cats are limited.
- Amantadine is described by Merck as a weak NMDA-receptor antagonist, with one study suggesting possible usefulness as an add-on treatment.
- Tramadol: Merck states that it “is ineffective in canine arthritis.”
- Polysulfated glycosaminoglycan (PSGAG) injections may be more beneficial in earlier stages of osteoarthritis in dogs, per Merck.
Evidence for most adjuncts remains limited compared with NSAIDs, so vets usually add them one at a time and watch the response.
How do the main options compare?
The table summarizes categories, not product recommendations. “Who prescribes” refers to how products are obtained in the US and Canada.
| Option category | What it is | What the evidence shows | Main cautions | Who prescribes / supplies |
|---|---|---|---|---|
| Veterinary NSAIDs (carprofen, meloxicam, deracoxib, firocoxib) | COX-inhibiting anti-inflammatory pain relievers | Merck calls NSAIDs the most predictably effective OA treatment | Vomiting, appetite loss, ulcers, kidney and liver effects; lab monitoring; not with other NSAIDs or steroids | Veterinarian (prescription only) |
| Grapiprant | EP4 prostaglandin receptor antagonist | One placebo-controlled trial showed better owner-rated pain scores than placebo | Vomiting more frequent than placebo in that trial; cost; still needs vet oversight | Veterinarian (prescription only) |
| Anti-NGF antibody (bedinvetmab) | Monthly injection targeting nerve growth factor | One NSAID-comparison trial reported improvement in both groups; use in mild disease remains controversial per Merck | Manufacturer-linked research; clinic visits; rare reported adverse events; ongoing monitoring | Veterinarian (clinic-administered) |
| Adjunct drugs (gabapentin, amantadine, PSGAG) | Add-on analgesics or injectable joint agents | Limited, mixed evidence | Sedation or other effects vary by drug; added complexity | Veterinarian |
| Omega-3 fatty acids (diets or supplements) | EPA/DHA-enriched food or fish-oil products | Barbeau-Grégoire meta-analysis found evident analgesic efficacy for omega-3 diets and supplements | Product quality varies; may cause digestive upset; check with vet if on other drugs | Veterinary diets, over the counter |
| Glucosamine / chondroitin | Joint “chondroprotective” nutraceuticals | Same meta-analysis found a “very marked non-effect”; Merck cites no beneficial effect | Cost without clear benefit; label accuracy varies | Over the counter |
| Non-drug measures | Weight loss, controlled exercise, rehab, home modifications | Merck describes weight optimization as the main way to slow OA development; AAHA endorses multimodal care | Needs consistency; some dogs need rehab guidance | Owner with vet or rehab practitioner |
For deeper supplement coverage, our dog arthritis supplements guide breaks down individual ingredients.
What does the evidence say about supplements versus drugs?
Supplements and drugs are often grouped together online, but they have different evidence bases and different regulatory status. The 2022 systematic review and meta-analysis by Barbeau-Grégoire and colleagues in the International Journal of Molecular Sciences screened 1,578 publications and included 57 articles covering 72 trials. It reported evident clinical analgesic efficacy for omega-3-enriched diets, omega-3 supplements and, to a lesser degree, cannabidiol; weak efficacy for collagen; and a very marked non-effect for chondroitin-glucosamine nutraceuticals. The authors recommended that the latter should no longer be recommended for pain management in canine and feline osteoarthritis.
That is a strong statement, and it comes with context. The review’s authors disclosed prior work in canine osteoarthritis for several drug and pet food companies, some of which led to studies included in the review, while declaring no conflict directly related to the review itself. Evidence in this area is best described as moderate for omega-3 and limited or weak for most others. Merck reports that EPA supplementation or EPA-rich diets improved gait and mobility in dogs and had an NSAID-sparing effect.
A reasonable reading: omega-3 products may support comfort alongside veterinary care, but they are not a replacement for prescription pain control in dogs with moderate to severe signs. If your vet is open to a joint supplement, ask which ingredient and which formulation they have confidence in. Our guide to vet-recommended joint supplements for dogs lists what to look for on a label.
Why can’t I give my dog human arthritis medicine?
Over-the-counter NSAIDs made for people, including aspirin, ibuprofen and naproxen, are not approved for dogs, and the FDA warns that dogs process these drugs differently, so they can cause harm. Acetaminophen is not an NSAID but can damage the liver and red blood cells in dogs, and veterinarians use it in dogs only under their direction, according to the FDA. Leftover prescriptions from another pet or a family member fall in the same category.
If your dog has accidentally swallowed a human pain reliever, call your veterinarian or a pet poison hotline immediately rather than waiting for symptoms.
What should I ask my vet before starting a medicine?
Bring this list to the appointment.
| Question | Why it matters |
|---|---|
| Why this drug for my dog rather than another class? | Clarifies the reasoning around kidney, liver, age and other medicines |
| Which baseline blood tests do you recommend, and how often will we repeat them? | The FDA advises baseline liver and kidney tests before long-term NSAID use, repeated regularly on a schedule the vet sets |
| What are the signs that mean I should stop and call? | Sets clear thresholds before anything happens |
| What other medicines and supplements is my dog on? | Prevents duplicate NSAIDs and NSAID-steroid combinations |
| How will we judge whether it is working? | Pain scales, mobility diary or video give an objective record |
| What is the plan for the lowest effective amount? | The FDA advises the lowest amount that controls pain for long-term use; changes should be vet-led |
| What non-drug steps should we start now? | Weight, exercise and home changes affect how much medication is needed |
Follow your veterinarian’s prescription and the product label for amounts and schedules. Do not adjust them on your own.
How do I monitor a dog on arthritis medication?
Monitoring has two parts: watching for side effects and tracking benefit. Both are easier with a simple written log.
| What to watch | What it may indicate | What to do |
|---|---|---|
| Vomiting, diarrhea, reduced appetite, lower activity | Common adverse effects listed by the FDA for NSAIDs | Stop the NSAID and call your vet (FDA guidance) |
| Black or bloody stool | Possible digestive bleeding or ulceration | Stop the medication and call the vet right away (FDA guidance) |
| Yellowing of gums or whites of the eyes | Possible liver involvement | Stop the medication and call the vet right away (FDA guidance) |
| Changes in drinking or urination | May be relevant to kidney health | Mention at the next visit or sooner if sudden |
| Better stairs, longer walks, easier rising | Possible sign of benefit | Record dates; share with the vet |
| Pain returning before the next scheduled dose or injection | The plan may need review | Contact your vet instead of adjusting on your own |
The FDA also notes that side effects can appear in a previously healthy dog and can continue for a while after stopping the drug. Owner-completed tools such as the Canine Brief Pain Inventory (mentioned by Merck and used in the grapiprant trial) or the Canine Orthopaedic Index (used in the bedinvetmab trial) give your vet a consistent way to compare weeks.
Which non-drug measures matter most?
Medication is rarely the whole plan. Merck describes weight optimization as the main way to slow the development of OA in dogs, and says that for overweight dogs with moderate to severe signs, a leaner body condition is crucial. Controlled exercise, such as short, regular, low-impact walks, is described as helping reduce pain through several mechanisms. Non-slip flooring, ramps and supportive bedding reduce daily strain. Our guide to helping a dog with arthritis at home walks through them room by room.
For a broader look at mixed approaches such as heat, massage and rehab, see our overview of dog joint pain relief.
When to call your vet
Contact your veterinarian promptly if you notice:
- Vomiting, diarrhea or a clear drop in appetite after starting or changing a medication.
- Black or bloody stool, or yellowing of the gums or eyes (stop the medication and call, per FDA guidance).
- Sudden worsening lameness, a limb held off the ground, or crying out in pain.
- Excessive sleepiness, wobbliness or a marked behavior change.
- Pain that returns before the next scheduled dose, or no visible benefit after the time your vet predicted.
- Any accidental ingestion of human pain medicine or another pet’s prescription.
Arthritis-like signs can also come from other conditions, so a dog with new or fast-moving signs needs an exam before any medication choice.
FAQ
What is the best arthritis medicine for dogs?
There is no single best option. Veterinary NSAIDs and the anti-NGF antibody bedinvetmab have the strongest clinical-trial support for pain control, but the right choice depends on your dog’s organ health, other medications, severity and your ability to attend rechecks. Your vet makes that decision.
Is there an over-the-counter arthritis medicine that is safe for dogs?
Not in the sense of human pain relievers. The FDA says aspirin, ibuprofen and naproxen are not approved for dogs and can cause harm. Some supplements, such as omega-3 products, have moderate supportive evidence, but they are not the same as prescription pain control. Ask your vet first.
Are supplements as effective as prescription arthritis drugs?
Research suggests not. A 2022 meta-analysis found evident analgesic efficacy for omega-3, weak efficacy for collagen, and a very marked non-effect for glucosamine-chondroitin products. Evidence remains limited for many other ingredients.
Is the monthly injection safer than daily tablets?
In a 2025 randomized trial, bedinvetmab was associated with fewer reported adverse events than meloxicam, but the study was small, open-label and manufacturer-linked. Both options carry considerations, and your vet weighs them for your dog.
Do dogs need blood tests on arthritis medication?
For long-term NSAID use, the FDA recommends baseline liver and kidney blood tests before starting and repeat tests on a schedule your vet sets. Ask what monitoring plan applies to your dog’s specific medicine.
Can arthritis medicine be stopped once my dog feels better?
Do not stop or change a prescription on your own. Merck notes that in dogs with mild signs, at least a month of NSAID treatment may be needed before withdrawal is attempted, while dogs with moderate to severe signs may need longer-term use. Your vet decides whether and how to adjust. may need at least a month of treatment before withdrawal is attempted, while moderate to severe signs may need longer-term use. Your vet decides whether and how to adjust.
References
- Gruen ME, Lascelles BDX, Colleran E, et al. 2022 AAHA Pain Management Guidelines for Dogs and Cats. J Am Anim Hosp Assoc. 2022;58(2):55-76. American Animal Hospital Association. DOI: 10.5326/JAAHA-MS-7292. PMID: 35195712. https://pubmed.ncbi.nlm.nih.gov/35195712/
- Barbeau-Grégoire M, Otis C, Cournoyer A, Moreau M, Lussier B, Troncy E. A 2022 Systematic Review and Meta-Analysis of Enriched Therapeutic Diets and Nutraceuticals in Canine and Feline Osteoarthritis. Int J Mol Sci. 2022;23(18):10384. DOI: 10.3390/ijms231810384. PMID: 36142319. https://pubmed.ncbi.nlm.nih.gov/36142319/
- Rausch-Derra L, Huebner M, Wofford J, Rhodes L. A Prospective, Randomized, Masked, Placebo-Controlled Multisite Clinical Study of Grapiprant, an EP4 Prostaglandin Receptor Antagonist (PRA), in Dogs with Osteoarthritis. J Vet Intern Med. 2016;30(3):756-763. DOI: 10.1111/jvim.13948. PMID: 27075237. https://pubmed.ncbi.nlm.nih.gov/27075237/
- Innes JF, Lascelles BDX, Bell D, et al. A randomised, parallel-group clinical trial comparing bedinvetmab to meloxicam for the management of canine osteoarthritis. Front Vet Sci. 2025;12:1502218. DOI: 10.3389/fvets.2025.1502218. PMID: 40196808. https://pubmed.ncbi.nlm.nih.gov/40196808/
- U.S. Food and Drug Administration, Center for Veterinary Medicine. Get the Facts about Pain Relievers for Pets. https://www.fda.gov/animal-veterinary/animal-health-literacy/get-facts-about-pain-relievers-pets
- Epstein ME. Osteoarthritis in Dogs and Cats. Merck Veterinary Manual (Professional Version; full review October 2024, updated August 2025; peer reviewer Carnevale J). https://www.merckvetmanual.com/musculoskeletal-system/osteoarthritis-in-dogs-and-cats/osteoarthritis-in-dogs-and-cats
Veterinary disclaimer
This article is for general education and is not veterinary advice, diagnosis or a treatment plan. Arthritis-like signs can have several causes, and medications have risks that depend on the individual dog. Always consult your licensed veterinarian before starting, changing or stopping any medication or supplement. In an emergency, contact your veterinarian or an emergency clinic immediately.