Solensia for Cats: Does It Work?
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Solensia is a once-monthly injection that reduces osteoarthritis pain in cats, and many owners see their cat move, jump, and groom more comfortably. It's the feline version of the same anti-NGF antibody approach used in dogs. Results vary and it isn't a cure, so it's a prescription decision to make with your vet, tracking your cat's comfort over time and reporting any side effects.
What is Solensia and how does it work?
Solensia (frunevetmab) is an FDA-approved monoclonal antibody that controls pain from osteoarthritis in cats. Your veterinary team gives it as an injection, typically once a month.
It works by targeting nerve growth factor (NGF), a protein that amplifies arthritis pain signals. By binding NGF, Solensia turns down those pain messages. Because it's an antibody, it's cleared by the body more like a natural protein than a conventional drug, which is helpful for cats, who are notoriously sensitive to many oral pain medications and often have kidney concerns as they age.
Does it actually work?
Arthritis is far more common in cats than most owners realize, especially in seniors, and its signs are subtle. Many owners on Solensia report their cat is more active, jumping again, grooming better, and using the litter box more easily.
That said, response varies. Some cats improve noticeably, others only a little. It manages pain rather than reversing joint damage, so it works best as part of a bigger plan that includes weight control and a cat-friendly home. If there's no clear improvement after a couple of monthly doses, your vet may reassess.
What side effects should I watch for?
In studies, Solensia was generally well tolerated. The more commonly noted effects included injection-site reactions, vomiting, and some skin irritation or itching in a subset of cats. As with the canine version, anti-NGF antibodies are a relatively new class, so owners should watch for and report anything unusual, including:
- Skin sores, scabbing, or excessive itching
- Vomiting or appetite changes
- New lethargy or behavior changes
- Any decline after an injection
Tell your vet about concerns so they can advise you and, if appropriate, file an adverse event report with the manufacturer (Zoetis) or the FDA.
How much does Solensia cost in 2026?
Pricing varies by clinic and region, and these are estimates, not fixed prices. Many owners report roughly $60-$100 per monthly injection, plus any exam fees. Because it's dosed by weight, most cats fall in a similar range regardless of size.
Over a year that adds up, so it's worth budgeting for and confirming the cost with your clinic before starting. Ask whether they offer package pricing or combine the injection with a routine senior check-up to save a separate visit.
How do I measure if it's helping my cat?
Cats hide pain, so tracking specific behaviors beats relying on impressions. Before the first dose, note your cat's baseline: are they jumping onto their favorite perch, using the stairs, grooming their whole body, and getting into the litter box comfortably?
After each monthly injection, check those same signs. In Tavi you can log each Solensia dose with a reminder for the next one, keep short notes on activity and any side effects, and export a vet-ready PDF for rechecks. That record helps you and your vet decide whether it's genuinely helping. Don't change or stop the schedule without your vet's guidance.
Frequently asked questions
How long does it take Solensia to work?
Some cats seem more comfortable within a week or two of the first injection, while others need a second monthly dose before improvement is obvious. If you see no meaningful change after two doses, talk with your vet about whether to continue, adjust, or investigate other causes of your cat's discomfort.
Is Solensia safe for cats with kidney disease?
Because it isn't processed like a typical drug, it appeals to owners of cats that can't take NSAIDs due to kidney concerns. Still, safety depends on your individual cat, so your vet should review kidney values and overall health first. Always share your cat's full history before starting.
How will I know if my cat has arthritis?
Signs are subtle: less jumping, hesitating on stairs, sleeping more, reduced grooming, a scruffy coat, or trouble in the litter box. Many owners mistake it for normal aging. A vet exam, and sometimes X-rays, can confirm arthritis, which is very common in senior cats.
Can Solensia be combined with other treatments?
Yes, it's often paired with weight management, joint supplements, environmental changes like lower-sided litter boxes and ramps, and sometimes other therapies. Any combination should be cleared by your vet, and you should share a full list of your cat's medications and supplements before starting.
What if my cat reacts badly to the injection?
Contact your vet and describe what you're seeing, such as skin sores, vomiting, itching, or a decline after the shot. Your vet can examine your cat, guide next steps, and file an adverse event report with Zoetis or the FDA. Keep a dated log of any symptoms to share.
Tavi's guides are informational and not a substitute for professional veterinary advice, diagnosis or treatment. When in doubt, call your veterinarian. Sources: U.S. Food and Drug Administration (FDA), Center for Veterinary Medicine; Zoetis Solensia product label; American Association of Feline Practitioners (AAFP); Cornell Feline Health Center
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