Cerenia for Pets

Cerenia is the brand name for maropitant citrate, a prescription anti-nausea and anti-vomiting medication used in dogs and cats. Veterinarians commonly prescribe it to help control vomiting, and in dogs it may also be used for motion sickness.

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Cerenia Quick Facts

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Drug class

Antiemetic; neurokinin-1 (NK-1) receptor antagonist.

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Common brand names

Cerenia; maropitant citrate is the active ingredient.

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Forms

Prescription tablets and veterinary-administered injectable solution.

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Species

Used in dogs and cats. Tablets are FDA-approved for dogs; injectable Cerenia is FDA-approved for treatment of vomiting in both dogs and cats.

What Cerenia Is Used For

Cerenia (maropitant citrate) is prescribed to help prevent or control vomiting and nausea in pets. It works by blocking NK-1 receptors involved in the vomiting pathway, which gives it broad antiemetic activity. In dogs, veterinarians commonly use it for acute vomiting and for motion sickness. In cats, it is commonly used to treat vomiting, including in hospital settings or as directed by a veterinarian. Because vomiting can be caused by many different problems—such as stomach upset, pancreatitis, kidney disease, toxin exposure, intestinal blockage, or other illness—Cerenia helps control the symptom, but it does not replace diagnosing the underlying cause. If your pet keeps vomiting, seems painful, acts weak, or has other concerning symptoms, call your vet.

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Side Effects to Watch For

Most pets tolerate Cerenia well, but side effects can happen.

Common side effects may include: • Drooling or hypersalivation • Vomiting despite treatment • Decreased appetite • Diarrhea • Pain, swelling, or vocalizing with the injectable form • Tiredness or lethargy

Less common but more serious concerns include: • Facial swelling, hives, or trouble breathing that could suggest an allergic reaction • Severe weakness, collapse, tremors, seizures, or uncoordinated walking • Ongoing vomiting, abdominal pain, or bloating that may mean the underlying problem is more serious • Worsening signs in pets with liver disease or in very young animals

Call your vet promptly if side effects are persistent, severe, or if your pet seems worse instead of better.

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Dosing & Administration

Always follow your vet's instructions. Do not change the dose, frequency, or duration on your own. Cerenia may be given as a tablet at home or as an injection by a veterinary professional, depending on your pet's needs. For some dogs using it for travel-related vomiting, your veterinarian may recommend giving it before travel and with a small meal. If your pet spits out the dose, vomits right after dosing, or you miss a dose, contact your veterinary team for advice rather than doubling the next dose. Tell your vet about any other medications, supplements, liver problems, heart disease, pregnancy, nursing status, or possible toxin exposure before giving Cerenia.

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When to Call a Vet

Emergency

Go to the ER now

● Trouble breathing, facial swelling, hives, or collapse after a dose
● Possible overdose, including severe lethargy, tremors, seizures, or collapse
● Repeated vomiting with a swollen belly, severe abdominal pain, or inability to keep water down
● Vomiting after a possible toxin exposure or suspected intestinal blockage

Urgent

See a vet within 24 hours

● Vomiting continues or returns despite Cerenia
● Persistent drooling, diarrhea, poor appetite, or marked lethargy
● Painful reaction or significant swelling after an injection
● Your pet has liver disease, is very young, pregnant, nursing, or is taking multiple other medications and seems unwell

Monitor

Watch at home, call if it worsens

● Mild temporary drooling
● Brief decrease in appetite
● Mild injection-site discomfort that resolves quickly
● One mild stomach upset episode if your pet is otherwise acting normal

Frequently Asked Questions

Can I give my dog human Cerenia or another human anti-nausea medicine?

No. Cerenia is a veterinary prescription medication, and you should never substitute a human anti-nausea medicine unless your veterinarian specifically tells you to. Some human medications are unsafe for pets or may mask signs of a more serious problem.

What happens if I miss a dose?

Give the missed dose when you remember unless it is almost time for the next one. Do not give two doses at once or give extra medication. If you are unsure what to do, call your vet for guidance.

Can my cat take Cerenia?

Yes, veterinarians do use maropitant in cats. Injectable Cerenia is FDA-approved for treatment of vomiting in cats, and oral use may be prescribed by your veterinarian when appropriate. Only give it to your cat if it was prescribed specifically for your cat.

How quickly does Cerenia work?

It usually starts working fairly quickly, often within a few hours. Even if vomiting improves, your pet may still need an exam if the underlying cause has not been identified or other symptoms are present.

Is it normal for the injection to sting?

Injection-site discomfort can happen, especially in cats. Mild temporary discomfort may be expected, but significant pain, swelling, or ongoing distress should be reported to your veterinarian.

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Disclaimer: The information provided in this article is for educational purposes only and does not constitute veterinary medical advice. Reading this content does not establish a veterinarian-client-patient relationship. Every pet is different — always consult a licensed veterinarian before making decisions about your pet's health, diet, or care. If you'd like personalized guidance, you can talk to one of our vets. If your pet is experiencing a medical emergency, contact your local emergency animal hospital immediately.

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