Dosage Guide • FL · NY · VA • Reviewed by Dr. Tiffany Delacruz, DVM
Solensia Dosage for a 5 lb Cat
frunevetmab · Monoclonal antibody (anti-NGF) for feline osteoarthritis · Kitten breed (5 lb / 2.3 kg)
What pet owners in Florida, New York, and Virginia need to know about Solensia dosing for a 5 lb (kittens 3-6 months old and adult Singapuras-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 5 lb matters
A 5 lb (2.3 kg) cat falls into the kitten category — typical examples include kittens 3-6 months old and adult Singapuras.
Kittens and very small cats have immature liver enzyme systems and are highly sensitive to many medications adult cats tolerate fine. Pill cutting or compounded liquids are often required for accurate dosing. Most adult-cat dosing rules don't apply — pediatric protocols are needed.
What Solensia is approved for
- Chronic pain associated with feline osteoarthritis
What to watch for in your 5 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 5 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 5 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 5 lb (2.3 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 kitten cat like mine?
Solensia (frunevetmab) is widely used in cats in the 5 lb range, but "safe" depends on the specific cat, not just the weight. Kittens and very small cats have immature liver enzyme systems and are highly sensitive to many medications adult cats tolerate fine. Pill cutting or compounded liquids are often required for accurate dosing. Most adult-cat dosing rules don't apply — pediatric protocols are needed. 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 5 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 kitten cats specifically: Kittens and very small cats have immature liver enzyme systems and are highly sensitive to many medications adult cats tolerate fine.
Can a RexVet online vet prescribe Solensia for my 5 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 (5 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 5 lb cat
Licensed RexVet veterinarians serving Florida, New York, and Virginia. $64.99 video visits, no membership required.