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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.

Important: This page does not provide a specific dose for your cat. The right dose depends on your cat's age, weight, kidney and liver function, current medications, and the condition being treated — and requires a veterinary examination.

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

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.

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?

Not after a video visit alone. A RexVet veterinarian can discuss whether Solensia is an option; it is given as an injection at a clinic.

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.

Questions about Solensia for your 5 lb cat?

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