CBD and NSAIDs for dog joint pain, side by side

What does research say about NSAIDs for dog joint pain?

NSAIDs, nonsteroidal anti-inflammatory drugs, are the most studied pharmaceutical option for canine osteoarthritis. They work by blocking enzymes that produce inflammation and pain signals, and decades of controlled trials have measured their effects.

A 2013 systematic review analyzed 64 prospective studies published between 1990 and 2012. The authors found that 55 percent of the studies reported adverse effects in at least some dogs, most commonly gastrointestinal signs such as vomiting, diarrhea and decreased appetite. When the authors looked only at the 25 randomized placebo-controlled blinded trials, the subset with the strongest design, the incidence of adverse effects was not statistically different between dogs receiving NSAIDs and dogs receiving placebo.

That finding suggests observer bias and natural disease progression account for some of the reported side effects, but it does not mean NSAIDs carry no risk. Long-term use can affect the liver and kidneys, which is why veterinarians recommend regular bloodwork for dogs on these medications.

What does research say about CBD for dog joint pain?

CBD, cannabidiol, interacts with the endocannabinoid system, a network of receptors involved in pain signaling and inflammation. Research in dogs with osteoarthritis is newer and smaller in scale than NSAID research.

A 2018 randomized placebo-controlled crossover study at Cornell University enrolled 16 dogs with osteoarthritis. Pain scores assessed by veterinarians decreased significantly in the CBD group compared to placebo, and owners reported increased activity. No adverse effects were reported by owners during the trial.

A 2023 meta-analysis pooled data from five studies involving 117 dogs with osteoarthritis. The analysis found that CBD supplementation was associated with lower pain scores based on owner questionnaires, but objective measurements such as force plate gait analysis showed inconsistent results. The authors concluded that CBD may help support comfort in some dogs, but the evidence remains limited.

A 2025 systematic review published in Veterinary Evidence assessed four papers and concluded that evidence supporting CBD as adjunct therapy for osteoarthritis pain remains weak when objective measurements are used. The review noted that owner assessments, while valuable, are subjective and may reflect placebo effects or observer bias.

What are the safety concerns with each option?

NSAID safety concerns center on the gastrointestinal tract, liver and kidneys. The 2013 systematic review found gastrointestinal signs were the most frequently reported adverse effect. Dogs with pre-existing liver or kidney disease, or those taking other medications, face higher risk and require closer monitoring.

CBD safety concerns focus on liver enzyme elevations. Multiple studies since 2018 have reported that alkaline phosphatase, or ALP, rises in approximately 50 to 60 percent of dogs receiving CBD. A 2024 long-term tolerability study in 18 healthy beagles found that ALP remained elevated in some dogs after 36 weeks of daily CBD, though no dogs showed clinical illness. A 2022 study suggested the elevated ALP may originate from bone rather than liver tissue, and values typically returned to baseline after stopping CBD. The clinical significance of these elevations remains unclear, but they warrant monitoring.

A 2023 narrative review noted that CBD can interact with other medications by affecting liver enzymes that metabolize drugs, which may increase or decrease the levels of those drugs in the bloodstream. Talk to your vet if your dog takes any prescription medications.

Can dogs take CBD and NSAIDs at the same time?

A 2024 prospective double-blind crossover placebo-controlled study enrolled 42 dogs with mobility impairments. Dogs received either CBD or placebo while continuing their existing pain medications, which for most dogs included NSAIDs. The researchers found that the combination was tolerated over the study period, with no significant adverse interactions reported.

The trial was designed to test tolerability, not whether the combination works better than either option alone. The study also did not run long enough to capture long-term safety signals. Check with your vet before adding CBD to any existing medication regimen, because individual dogs metabolize compounds differently and monitoring may be needed.

How do the two options compare in head-to-head trials?

No published study has directly compared CBD monotherapy to NSAID monotherapy in dogs with osteoarthritis. The trials testing CBD have either used it as an add-on to existing pain management or compared it to placebo. Without a direct comparison, we cannot say which option is more effective or safer for a given dog.

The 2023 meta-analysis noted that the studies reviewed used CBD as an adjunct, not a replacement, and the 2025 systematic review concluded that the evidence for CBD remains weak when objective measures are applied. NSAIDs, by contrast, have been tested in hundreds of controlled trials over decades, which gives veterinarians a clearer picture of their benefits and risks.

What should an owner consider when choosing between them?

Start by talking to your vet. Factors that matter include your dog's age, weight, existing health conditions, current medications, and the severity of the joint disease. A dog with mild arthritis and no organ issues may respond to NSAIDs with minimal monitoring. A dog with kidney disease or a history of gastrointestinal bleeding may not tolerate NSAIDs well, and CBD might be worth discussing, though its efficacy remains less certain.

If your vet recommends trying CBD, ask about dosing, monitoring for liver enzyme changes, and what signs would prompt stopping it. If your vet prescribes an NSAID, ask about the schedule for bloodwork and what symptoms to watch for at home, such as vomiting, diarrhea, or changes in appetite or thirst.

See your vet if your dog shows any of the following while taking either option: vomiting, black or tarry stools, decreased appetite lasting more than a day, increased thirst or urination, lethargy, or worsening lameness. These signs can indicate a serious problem that needs immediate attention.