Trazodone for Cats: Uses, Dosage & Side Effects

This information is for educational purposes only. Never give your pet any medication without your veterinarian's guidance. Dosing, frequency, and safety depend on your pet's specific health profile.

Trazodone is a prescription medication your vet may use off-label in cats to help reduce anxiety, fear, and stress-related behaviors. It belongs to a group of medications called serotonin antagonist and reuptake inhibitors (SARIs). In plain language, it affects serotonin signaling in the brain, which can help some cats feel calmer in stressful situations.

In feline medicine, trazodone is most often used for short-term, situational stress rather than as a stand-alone long-term behavior medication. Your vet may recommend it before a car ride, grooming appointment, veterinary visit, or another event your cat finds upsetting. Some cats also receive it as part of a broader behavior plan that includes environmental changes, handling adjustments, and other medications.

Because trazodone use in cats is extra-label, there is no one-size-fits-all dose. Age, body weight, kidney or liver health, heart disease, and other medications all matter. That is why your vet may suggest a test dose at home before the actual stressful event, so you can see how your cat responds in a familiar setting.

Trazodone is usually used in cats for fear, anxiety, and stress linked to specific events. Common examples include veterinary visits, travel, nail trims, medication administration, visitors in the home, or short-term confinement after surgery or injury. In the Merck Veterinary Manual, trazodone is listed as one option for situational anxiety in cats, especially before stressful events.

Your vet may also use trazodone as an adjunct medication when a cat needs more support than environmental changes alone can provide. That can include cats with fear-based aggression, panic during handling, or severe distress during transport. It is not a cure for behavior problems by itself, but it can make training, desensitization, and safer handling more realistic.

For some cats, trazodone is chosen because it often starts working within about 1 to 2 hours for short-term calming. For longer-term behavior plans, your vet may pair it with other strategies or medications, depending on your cat's triggers, medical history, and daily routine.

Always use the exact dose your vet prescribes. In cats, trazodone dosing is individualized and commonly based on the reason for use, your cat's size, and how sensitive they are to sedation. A commonly cited situational dose in feline behavior references is 50 to 100 mg per cat by mouth about 90 minutes before a stressful event, but that does not mean every cat should receive that amount.

Many cats need a lower starting point, especially if they are small, senior, medically fragile, or taking other sedating medications. Your vet may recommend a trial dose at home on a quiet day before travel or an appointment. That helps you learn whether your cat becomes appropriately calm, too sleepy, or not calm enough.

Trazodone is usually given as a tablet. It may be given with or without food, though giving it with a small meal can help if your cat gets an upset stomach. Do not double up if you miss a dose unless your vet specifically tells you to. If your cat has liver disease, kidney disease, glaucoma, severe heart disease, or is pregnant, your vet may adjust the plan or choose another option.

The most common side effects are related to sedation and coordination. Your cat may seem sleepy, quieter than usual, wobbly, or less interested in activity for several hours after a dose. Some cats also have vomiting, gagging, dilated pupils, or lethargy. Mild effects often wear off as the medication leaves the body, but you should still let your vet know if they are stronger than expected.

A smaller number of cats may have the opposite response and seem more restless, agitated, or reactive. That is one reason a home test dose can be so helpful. If your cat seems disoriented, cannot walk normally, or is much more sedated than your vet expected, contact your vet promptly.

See your vet immediately if you notice signs that could fit serotonin syndrome or overdose. Warning signs can include vomiting, diarrhea, tremors, seizures, very high body temperature, trouble breathing, severe agitation, collapse, or coma. Emergency help is also important if your cat accidentally chews into a bottle or gets another pet parent's trazodone tablets.

Trazodone can interact with other medications that affect serotonin, sedation, blood pressure, or heart rhythm. The most important concern is combining trazodone with other serotonergic drugs, which can raise the risk of serotonin syndrome. Examples your vet will want to review include fluoxetine, clomipramine, tramadol, ondansetron, metoclopramide, and monoamine oxidase inhibitors.

Other medications may increase sleepiness or change how trazodone is processed in the body. VCA lists caution with acepromazine, CNS depressants, antihypertensives, azole antifungals, macrolide antibiotics, fluoroquinolones, cisapride, diuretics, aspirin, and NSAIDs. That does not always mean the combination cannot be used. It means your vet needs the full medication list first.

Tell your vet about everything your cat receives, including supplements, calming chews, CBD products, flea and tick medications, and compounded prescriptions. If another clinic prescribed medication recently, share the exact drug name and strength. Small details can change whether trazodone is a reasonable option and what dose range is safest.