Dosage Guide • FL · NY · VA • Reviewed by Dr. Tiffany Delacruz, DVM
Solensia Dosage for a 12 lb Cat
frunevetmab · Monoclonal antibody (anti-NGF) for feline osteoarthritis · Medium adult breed (12 lb / 5.4 kg)
What pet owners in Florida, New York, and Virginia need to know about Solensia dosing for a 12 lb (average-sized Domestic Shorthairs-sized) cat — written by a licensed vet, no specific dose given without an exam.
The dosing principle for Solensia
Solensia (frunevetmab) is dosed at a minimum of 1 mg/kg subcutaneously once monthly, administered by a veterinarian. Pre-filled syringes come in fixed volumes (0.4 mL = 5.6 mg, 0.7 mL = 9.8 mg) — vets pick the closest fit for the cat's weight.
Solensia is administered by a veterinarian — there's no at-home component for the injection itself. Weight matters because the dose is fitted to the closest pre-filled syringe size. Most cats respond within 1-2 monthly injections. It's currently considered the most well-tolerated chronic pain option for cats and has revolutionized feline arthritis management.
Why 12 lb matters
A 12 lb (5.4 kg) cat falls into the medium adult category — typical examples include average-sized Domestic Shorthairs, British Shorthairs, and Ragdolls.
12 lb is the upper bound of typical healthy cat weight for many breeds. Above 12 lb, vets begin considering whether the cat is genuinely large or carrying extra body weight that affects drug distribution.
What Solensia is approved for
- Chronic pain associated with feline osteoarthritis
What to watch for in your 12 lb cat
- Injection-site reaction (uncommon)
- Vomiting or diarrhea (uncommon)
- Loss of response over time — some cats need dose adjustment or additional therapies
- Most cats tolerate it remarkably well — Solensia is considered the safest chronic pain option for cats
Get a Solensia prescription or refill in your state
RexVet is licensed in Florida, New York, and Virginia. Our veterinarians can examine your 12 lb cat by video, calculate the right Solensia dose for their specific situation, and either fill the prescription through our in-house pharmacy or send it to a local pharmacy near you.
Florida
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New York
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Virginia
Online vet care for VA pet owners — Virginia Beach, Richmond, Norfolk, Arlington, and 20+ VA cities.
Frequently asked questions
Frequently asked questions
How much Solensia can I give my 12 lb cat?
Solensia (frunevetmab) is dosed at a minimum of 1 mg/kg subcutaneously once monthly, administered by a veterinarian. Pre-filled syringes come in fixed volumes (0.4 mL = 5.6 mg, 0.7 mL = 9.8 mg) — vets pick the closest fit for the cat's weight. For a 12 lb (5.4 kg) cat, this gives a range that a licensed vet will narrow down based on the indication, your cat's age, kidney/liver function, and any other medications. RexVet vets serve Florida, New York, and Virginia and can calculate the right dose for your specific cat in a $64.99 video visit.
Is Solensia safe for a medium adult cat like mine?
Solensia (frunevetmab) is widely used in cats in the 12 lb range, but "safe" depends on the specific cat, not just the weight. 12 lb is the upper bound of typical healthy cat weight for many breeds. Above 12 lb, vets begin considering whether the cat is genuinely large or carrying extra body weight that affects drug distribution. A licensed vet will check your cat's history, current medications, and any underlying conditions before prescribing.
What should I watch for after giving my 12 lb cat Solensia?
The most common things to watch for are: Injection-site reaction (uncommon); Vomiting or diarrhea (uncommon); Loss of response over time — some cats need dose adjustment or additional therapies. If you see anything concerning, contact a vet. For medium adult cats specifically: 12 lb is the upper bound of typical healthy cat weight for many breeds.
Can a RexVet online vet prescribe Solensia for my 12 lb cat?
Yes — if your cat is in Florida, New York, or Virginia and the medical situation is appropriate. Solensia is one of the medications RexVet's licensed veterinarians can prescribe via a $64.99 video visit. The vet will examine your cat by video, ask about history, and either prescribe Solensia at the right dose for your cat's weight (12 lb) or recommend a different approach if needed.
Can I get a Solensia refill in Florida, New York, or Virginia online?
Yes. RexVet is licensed in all three states and can refill Solensia prescriptions for cats already established on the medication. Refill visits are also $64.99. Prescriptions are filled through RexVet's in-house pharmacy (RexVetRx) or can be sent to your local pharmacy. Same-day delivery is available in most ZIP codes in FL, NY, and VA.
Solensia dosing for other cat weights
Sources
Last fact-checked: 2026-06-01. Reviewed by Dr. Tiffany Delacruz, DVM. RexVet (Rex Vets Inc.) is licensed in Florida, New York, and Virginia.
Get the right Solensia dose for your 12 lb cat
Licensed RexVet veterinarians serving Florida, New York, and Virginia. $64.99 video visits, no membership required.