Dosage Guide • FL · NY · VA • Reviewed by Dr. Tiffany Delacruz, DVM
Cerenia Dosage for a 5 lb Cat
maropitant · Neurokinin-1 (NK-1) receptor antagonist / antiemetic · Kitten breed (5 lb / 2.3 kg)
What pet owners in Florida, New York, and Virginia need to know about Cerenia 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 Cerenia
Cerenia (maropitant) for cats is typically dosed at approximately 1 mg/kg subcutaneously or orally for up to 5 consecutive days. There are FDA-approved cat tablets and injectable formulations.
Cerenia is one of the safest antiemetics available for cats, but accurate weight-based dosing matters because under-dosing fails to control vomiting (a major problem for sick cats prone to dehydration and hepatic lipidosis) while over-dosing can cause local injection-site pain. The cat formulation is different from the dog formulation — they are not interchangeable.
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 Cerenia is approved for
- Acute vomiting
- Chemotherapy-induced nausea
- Pre-travel motion sickness
- Pre-anesthetic nausea prevention
What to watch for in your 5 lb cat
- Lethargy in the first dose or two (uncommon)
- Pain or swelling at the injection site if given SQ (a common, transient finding)
- Continued or worsening vomiting despite Cerenia — the underlying problem needs investigation
- Decreased appetite that doesn't improve once nausea is controlled
Get a Cerenia 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 Cerenia 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 Cerenia can I give my 5 lb cat?
Cerenia (maropitant) for cats is typically dosed at approximately 1 mg/kg subcutaneously or orally for up to 5 consecutive days. There are FDA-approved cat tablets and injectable formulations. 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 Cerenia safe for a kitten cat like mine?
Cerenia (maropitant) 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 Cerenia?
The most common things to watch for are: Lethargy in the first dose or two (uncommon); Pain or swelling at the injection site if given SQ (a common, transient finding); Continued or worsening vomiting despite Cerenia — the underlying problem needs investigation. 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 Cerenia for my 5 lb cat?
Yes — if your cat is in Florida, New York, or Virginia and the medical situation is appropriate. Cerenia 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 Cerenia at the right dose for your cat's weight (5 lb) or recommend a different approach if needed.
Can I get a Cerenia refill in Florida, New York, or Virginia online?
Yes. RexVet is licensed in all three states and can refill Cerenia 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.
Cerenia 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 Cerenia dose for your 5 lb cat
Licensed RexVet veterinarians serving Florida, New York, and Virginia. $64.99 video visits, no membership required.