What bedinvetmab does — and what it does not do
A damaged, inflamed joint releases nerve growth factor. NGF sensitises the nerves around that joint so that ordinary movement registers as pain. Bedinvetmab is an antibody built to bind NGF before it reaches those nerves (Gearing et al., BMC Veterinary Research 2013). It is cleared slowly — mean half-life after a first dose was 19.1 days — which is what makes monthly dosing possible.
Does it work? The numbers, not the brochure
| Study | Design | Result |
|---|---|---|
| Corral et al., Vet Anaesth Analg 2021 (287 dogs) | Placebo-controlled, monthly dosing | Day 28 treatment success 43.5% vs 16.9% on placebo; 50.8% at day 56 |
| Michels et al., Vet Anaesth Analg 2023 (272 dogs) | Placebo-controlled | Day 28 success 47.4% vs 36.6% placebo — number needed to treat 9.3, effect size 0.3; by day 84, NNT 4.3 |
| Innes et al., Front Vet Sci 2025 (101 dogs) | Randomised, bedinvetmab vs oral meloxicam | Both cut Canine Orthopaedic Index scores significantly; the gap between them was not statistically significant. 4 adverse events on bedinvetmab vs 17 on meloxicam, nine gastrointestinal |
Read the third row carefully, because it reframes the decision. Against a cheap, familiar NSAID, bedinvetmab did not deliver measurably better pain relief — it delivered fewer adverse events and better study completion. For a dog whose stomach cannot tolerate an NSAID, or one on medication that rules NSAIDs out, that is a genuinely strong argument. As a blanket upgrade for every arthritic dog, the evidence is thinner than the marketing suggests. If glucosamine is on the shortlist for joint support, the glucosamine buying guide helps you check form, daily amount and overlapping ingredients before choosing a bottle or chew. For the comparison criteria behind this choice, see Dog Arthritis Medicine: Best Treatments & Safe Relief | New Zealand Guide. For a closer look at the question raised here, read Supplements for Hip Dysplasia in Dogs: Evidence Ranked.
To separate the related decisions, consider Why Do Dogs Stretch? Morning Stretches, Play Bows and Warning Signs. Each guide addresses a different part of the care or product-choice question.
To separate the related decisions, consider joint supplement comparison and collagen comparison. Each guide addresses a different part of the care or product-choice question.
The next useful comparison depends on the question you want to resolve: respiratory supplement comparison and How to Help a Dog With Arthritis at Home (2026 Vet Guide) | New Zealand Guide. Check the specific ingredients, purpose and limits rather than treating the options as interchangeable.
To separate the related decisions, consider Glucosamine or collagen for Kiwi dogs? A practical joint-supplement comparison and Best Dog Food for Joint Health: A Nutrition Guide | New Zealand Guide. Each guide addresses a different part of the care or product-choice question.
The next useful comparison depends on the question you want to resolve: When to Start Joint Supplements for Dogs: Age & Signs | New Zealand Guide and Hip Dysplasia in Dogs: Signs, Stages and What Slows It Down | New Zealand Guide. Check the specific ingredients, purpose and limits rather than treating the options as interchangeable.
To separate the related decisions, consider Glucosamine Chondroitin for Dogs: Dosage, Safety & Evidence | New Zealand Guide. Each guide addresses a different part of the care or product-choice question.
One more thing worth knowing before you judge the first month: Conzemius and Evans measured a caregiver placebo effect of roughly 40% when owners assessed lameness in arthritic dogs. Take a ten-second video of your dog rising and walking on injection day, and another two weeks later. Compare the footage, not your memory of it. Before choosing a CBD product for a separate comfort concern, check the CBD oil comparison and review its current label with your veterinarian.
When to call your vet
Contact your practice promptly if a dog on Beransa develops a newly swollen or painful joint, a sudden worsening of lameness, an inability to bear weight, wobbliness or loss of coordination, a seizure, weakness or dragging of the hind legs, facial swelling or intense itching after an injection, or collapse. Tell your vet before the first dose if your dog has any history of immune-mediated disease or seizures.
Never fill a gap with a human painkiller. Ibuprofen, naproxen and paracetamol are all dangerous to dogs.
The realistic way to think about it
Frequently asked questions
Is Beransa the same thing as Librela?
Can my dog have a joint supplement while on Beransa?
Ask your own vet, who knows the full medication list. A joint supplement is a feed product working on daily nutritional support, not an analgesic that blocks pain signalling, so the two are not substitutes for each other. Disclose everything your dog receives, supplements included.
How long before I know whether it is working?
The pivotal trials measured treatment success at day 28, with response rates improving after a second dose. If there is no useful response after two doses the product information directs the vet to consider alternatives. Film ten seconds of your dog moving on day one and again a fortnight later — owners of placebo-treated dogs reported improvement around 40% of the time.
References
- Gearing DP et al. A fully caninised anti-NGF monoclonal antibody for pain relief in dogs. BMC Vet Res 2013;9:226. PMID 24206926
- Corral MJ et al. Vet Anaesth Analg 2021;48(6):943-955. PMID 34565678
- Michels GM et al. Vet Anaesth Analg 2023;50(5):446-458. PMID 37541934
- Innes JF et al. Front Vet Sci 2025;12:1502218. PMID 40196808
- Farrell M et al. Musculoskeletal adverse events in dogs receiving bedinvetmab. Front Vet Sci 2025;12:1581490. PMID 40417367
- Monteiro BP et al. Front Vet Sci 2025;12:1558222. PMID 40343372
- Yang et al. A critical appraisal of the safety of bedinvetmab (Beransa). Aust Vet J 2026;104:549-556. doi:10.1111/avj.70088
- Conzemius MG, Evans RB. JAVMA 2012;241(10):1314-1319. PMID 23113523
- Barbeau-Grégoire M et al. Int J Mol Sci 2022;23(18):10384. PMID 36142319
- Marshall WG et al. Vet Res Commun 2010;34(3):241-253. PMID 20237844
New Zealand buying and veterinary context
Local reference: New Zealand's Ministry for Primary Industries (MPI) publishes the legal requirements for manufacturing, selling, using and importing pet food, animal feed and nutritional supplements, with separate rules for promotion and advertising.
Local competitors to compare
Useful local comparison points include Petdirect and Vetpost. Compare the disclosed ingredients, amount per serving, directions, price per daily serving, returns and delivery terms. A retailer listing alone is not clinical evidence.
Pure Majesty Pets option
For the product category covered in this guide, Pure Majesty Pets provides a direct page where you can review the formula and serving information before ordering. Compare it with the local options above and discuss persistent or severe symptoms with your veterinarian.
Shop All Dog Supplements in New Zealand
Local availability and prices can change. Supplements and routine-care products do not replace diagnosis or prescribed veterinary treatment.
Seasonal context: In New Zealand, spring is September–November, summer December–February, autumn March–May and winter June–August. Local weather and pollen timing still vary by region.