Cerenia® for Dogs: What It’s Used For, How It Works and Side Effects
Whether it’s due to car sickness or eating something questionable on your morning walk, seeing your dog vomit is both worrisome—and messy. Fortunately, medications like Cerenia® can help combat nausea and vomiting in dogs, so your pup can enjoy car rides or their day more comfortably.
We spoke with veterinary professionals to learn all about Cerenia® for dogs—including how it works, how to administer it, potential side effects, and important safety considerations.
What Is Cerenia®, and How Is It Used in Dogs?
Cerenia® (maropitant citrate) is an FDA-approved antiemetic medication used to prevent vomiting caused by motion sickness—such as car sickness—or sudden-onset vomiting (acute vomiting) from other causes.
A 2012 study of dogs riding in cars found that 24.5% frequently experience excessive drooling (hypersalivation), and 18% frequently vomit.
According to Dr. Bethany Hsia, DVM, co-founder of CodaPet in Fresno, California, veterinarians may also prescribe Cerenia® for acute vomiting triggered by conditions such as:
- Eating something that upsets the stomach—like inappropriate food, treats, or foreign material (dietary indiscretion)
- Nausea after anesthesia or surgery (post-operative)
- Inflammatory bowel disease
- Gastroenteritis
- Chemotherapy side effects
- Acid reflux
- Internal issues such as kidney or liver disease
Dr. Paige Adams, DVM, medical director at Etowah Veterinary Hospital in Marietta, Georgia, notes that Cerenia® is one of the most commonly prescribed medications for preventing motion sickness and vomiting in dogs. She adds that it also has mild anti-coughing properties—so some vets prescribe it off-label for conditions like collapsing trachea.
Off-label use means prescribing a medication for a purpose not specifically approved by regulatory agencies like the FDA—but still supported by clinical experience and veterinary judgment.
Can Cerenia® Be Used for Puppies?
Yes—Cerenia® can be given to puppies 2 months and older to prevent acute vomiting, and to puppies 4 months and older to prevent motion-sickness-related vomiting.
This is especially helpful since puppies tend to experience car sickness more often than adult dogs. They’re also new to car travel, which can increase anxiety and stress—factors that further contribute to nausea.
How Does Cerenia® Work?
To understand how Cerenia® helps prevent vomiting, it helps to know how the brain controls nausea.
The “vomit control center” in the brain—called the emetic center—detects signals that trigger nausea and vomiting. A key part of this process involves a neurotransmitter called substance P binding to neurokinin-1 (NK1) receptors.
Cerenia® works by blocking those NK1 receptors. When substance P can’t bind, the brain doesn’t receive the signal to become nauseated or vomit—keeping your dog comfortable and symptom-free.
How Do You Give Your Dog Cerenia®?
Cerenia® is typically administered orally as a tablet, though veterinarians may also give it as a subcutaneous injection.
Whether given by mouth or injection, Cerenia® begins working within one to two hours and remains effective for approximately 24 hours.
To give your dog a Cerenia® tablet:
- Hide it in a pill pocket or soft treat
- Offer a small amount of food (not a full meal) about two hours before travel
- Repeat this routine for up to two consecutive days for motion sickness prevention
For acute vomiting:
- Puppies aged 2–7 months may receive one dose daily for up to five days
- Dogs older than 7 months may continue treatment for as long as prescribed by their veterinarian
Dosage depends on your dog’s age, weight, and condition—so always follow your vet’s instructions carefully to minimize risks.
What Are the Side Effects of Cerenia® for Dogs?
Cerenia® is generally safe and well-tolerated, but like any medication, it can cause side effects. Most are mild and uncommon—but it’s important to recognize them early.
The most frequently reported side effects include:
- Excessive drooling
- Diarrhea
- Decreased appetite
- Vomiting
- Injection site reaction (swelling or tenderness)
What To Do If Your Dog Takes Too Much Cerenia®
“It is quite difficult to overdose this medication, as it has a very high safety profile,” says Dr. Adams. While accidental overdoses are possible, they rarely cause serious harm—and symptoms can usually be managed with supportive care.
If your dog receives more Cerenia® than prescribed—or shows unusual symptoms after taking it—contact your veterinarian right away. You can also call a trusted animal poison control center, such as the Pet Poison Helpline at 855-764-7661, for expert guidance. (Note: Consultation fees may apply.)
FAQs about Cerenia® for Dogs
When should Cerenia® not be used?
Cerenia® should not be used in dogs who have:
- Ingested toxins
- A gastrointestinal obstruction
- Not yet reached 2 months of age
Use caution when giving Cerenia® to dogs who are pregnant, nursing, or have heart or liver disease. Also, avoid using it for motion sickness in puppies under 4 months old—the higher dose needed for this purpose has been linked to low blood cell counts (bone marrow suppression).
What are the signs that my dog might need Cerenia®?
Signs include motion-sickness behaviors during car rides—like restlessness, excessive drooling, lip licking, or vomiting. It may also be appropriate for sudden, unexplained vomiting. Always consult your veterinarian first to confirm whether Cerenia® is the right choice for your dog’s situation.
Can Cerenia® be used for cats?
Only the injectable form of Cerenia® is FDA-approved for preventing acute vomiting in cats. However, veterinarians frequently prescribe Cerenia® tablets off-label for feline patients—especially when managing chronic nausea or vomiting.
Important: Cat dosing differs significantly from dog dosing. Never adjust dosage without direct guidance from your veterinarian.
While Cerenia® offers reliable support for motion sickness and vomiting, it’s just one part of a broader strategy. Consider pairing it with behavioral training, gradual desensitization to car travel, and tools from FurPetVo—including calming supplements and travel-friendly gear available at furpetvo.com.
