Last Updated on May 5, 2026 by admin
Cerenia is the brand name for maropitant citrate, a prescription anti-vomiting medication used in veterinary medicine. For cats, the key safety point is this: the injectable form is FDA-labeled for the treatment of vomiting in cats, while Cerenia tablets are labeled for dogs. A veterinarian may sometimes prescribe tablets to a cat as extra-label use, but that decision and dose should come from the veterinarian who examined the cat.
Do not use leftover Cerenia, dog-labeled tablets, online dose charts, or a dose calculated from another pet’s prescription. Vomiting in cats can signal toxins, obstruction, kidney disease, pancreatitis, infection, liver disease, diabetes complications, pain, or other problems that need diagnosis, not just symptom control.
Quick Answer
- Cerenia Injectable Solution is FDA-labeled for treating vomiting in cats 4 months of age and older.
- Cerenia tablets are FDA-labeled for dogs, not cats; cat tablet use is extra-label and must be directed by a veterinarian.
- The labeled injectable cat regimen is weight-based and given by subcutaneous or intravenous injection once daily for up to 5 consecutive days.
- If vomiting continues despite Cerenia, the cat should be rechecked because the underlying cause may not be controlled.
- Do not give Cerenia to a cat with possible toxin exposure, obstruction, severe lethargy, collapse, or repeated vomiting without urgent veterinary guidance.
What Cerenia Does
Maropitant is an NK1 receptor antagonist. In plain language, it blocks substance P, a chemical messenger involved in the vomiting pathway. That is why veterinarians use it to control vomiting and nausea-related vomiting in many clinical situations.
Cerenia can make a cat more comfortable while the veterinarian investigates and treats the underlying problem. It does not cure the reason the cat is vomiting. A cat who stops vomiting but still will not eat, hides, drools, seems painful, or becomes weak still needs veterinary follow-up.
Is Cerenia Approved for Motion Sickness in Cats?
The FDA label for Cerenia Injectable Solution lists cats for the treatment of vomiting. It does not list cats for prevention of vomiting due to motion sickness. The tablet label lists prevention of acute vomiting and motion-sickness vomiting in dogs.
That distinction matters. Some veterinarians may use maropitant extra-label in cats for travel-related vomiting or nausea, but owners should not treat cat motion sickness on their own. Ask your veterinarian whether medication, carrier training, travel timing, or a different plan is safest for your cat.
Injection vs Tablets
Cerenia Injectable Solution contains 10 mg of maropitant per mL and is labeled for cats 4 months of age and older. It may be given under the skin or intravenously by a veterinary professional. The label notes that refrigerated product may reduce the pain response associated with subcutaneous injection.
Cerenia tablets come in several strengths and are labeled for oral use in dogs only. If your veterinarian sends home tablets for a cat, that is extra-label prescribing. Extra-label does not automatically mean unsafe, but it does mean the veterinarian is responsible for choosing the route, dose, schedule, and monitoring plan for that individual cat.
Do Not DIY a Cat Dose
Medication articles often try to answer questions such as how much Cerenia to give a 10-pound cat. That can be risky. The right answer depends on the cat’s diagnosis, hydration, liver function, other medications, age, formulation, concentration, and whether the cat is still vomiting.
Use only the amount and schedule printed or written by your veterinarian for your cat. If a dose was missed, vomited, given early, or possibly given twice, call your veterinarian or an animal poison-control service instead of guessing.
Precautions Your Vet Considers
The FDA label says the safe use of Cerenia Injectable Solution has not been evaluated in cats with gastrointestinal obstruction or toxin ingestion. It also advises caution in patients with hepatic dysfunction because the drug is metabolized by liver enzymes.
The label also notes that Cerenia is highly protein bound and should be used with caution with other highly protein-bound medications. That can matter for cats taking medications such as some anti-inflammatory, cardiac, anticonvulsant, or behavior drugs. Tell your veterinarian about every prescription, supplement, flea product, and over-the-counter medication your cat receives.
The safe use of the injectable product has not been evaluated in pregnant or lactating queens or in breeding animals, so those cats need individualized veterinary judgment.
Possible Side Effects
The most noticeable side effect in cats is often discomfort at the injection site. In cat field studies, cats receiving the injection commonly showed moderate or significant responses to injection. Reported adverse events in cats have also included fever, dehydration, lethargy, anorexia, hypersalivation, vomiting, panting, ataxia, tremors, convulsions, and other signs.
Call your veterinarian if your cat seems worse after Cerenia, will not eat, is unusually quiet, drools heavily, vomits repeatedly, has diarrhea, stumbles, trembles, has breathing trouble, or shows any seizure-like activity.
When Vomiting Needs Urgent Care
Seek veterinary help urgently if your cat has repeated vomiting, blood in vomit or stool, a swollen or painful belly, suspected string or foreign-object ingestion, suspected poison exposure, collapse, severe weakness, pale gums, trouble breathing, inability to keep water down, no appetite for a day, or vomiting with diabetes, kidney disease, liver disease, or known chronic illness.
Kittens, senior cats, and cats with chronic disease can dehydrate quickly. Waiting to see whether medication works can be dangerous when the underlying cause is serious.
Questions to Ask Your Veterinarian
- What do you think is causing my cat’s vomiting?
- Is this Cerenia injectable or tablet medication?
- Is tablet use extra-label for my cat?
- How long should my cat take it?
- What side effects should make me stop and call?
- What should I do if vomiting continues?
- Does my cat need blood work, imaging, fluids, or a diet change?
The Bottom Line
Cerenia can be a useful prescription medication for cats with vomiting, but it should be part of a veterinary plan. The injectable product is FDA-labeled for cats; the tablets are dog-labeled and require veterinary extra-label direction for cats. Do not dose from internet math, do not use leftover medication, and do not assume stopped vomiting means the underlying illness is fixed.