# Trazodone Dosage for Cats: What Owners Should Know Trazodone for cats dosage is not something you can safely copy from a dog chart or a friend's prescription. Your veterinarian calculates the dose from your cat's weight, health, and the reason for the medication. Most cats receive a single dose about one to two hours before a stressful event such as a vet visit or car ride. This article is educational and is not a substitute for veterinary diagnosis or treatment. ## Quick Answer - Trazodone is a prescription sedative and anxiolytic used in cats, often before vet visits, travel, or grooming. - The sedative effect usually starts within about 1 hour after oral dosing [3]. - Never split a human tablet or guess a dose from a dog chart. Cat dosing is different. - Call your veterinarian or a pet poison control hotline right away if your cat gets too much or becomes hard to wake. ## What Trazodone Is and Why Veterinarians Use It Trazodone is an oral medication that veterinarians prescribe to reduce fear, anxiety, and stress in cats. It belongs to a group of drugs called serotonin receptor modulators [4]. In people, trazodone is used mainly as an antidepressant. In cats, it is used for short-term sedation and calming. Veterinarians commonly prescribe it for situations that frighten cats, such as veterinary appointments, blood draws, travel, and grooming. A review of oral sedatives in cats found that trazodone is one of several medications used to reduce fear-based behaviors and make handling safer [4]. The goal is not to knock your cat out. The goal is a calmer, easier-to-handle cat that experiences less distress. One review of pre-appointment trazodone found that cats given the medication had significantly lower behavioral stress scores during veterinary visits compared with cats given a placebo [5]. ## How Trazodone Works in Cats Trazodone changes how certain brain chemicals signal. It blocks some serotonin receptors and affects others, which produces calming and sedating effects. In cats, the result is usually relaxation and reduced anxiety instead of deep sleep. A study of healthy cats found that oral trazodone significantly increased sedation scores compared with baseline, with no significant change in muscle relaxation or pain relief [6]. That means your cat may look sleepy and calm, but the drug is not an anesthetic and does not provide pain control. The same study measured blood pressure and heart rate. A modest average drop in systolic blood pressure (about 22 mmHg) occurred only at one time point after a 100 mg dose, and the value stayed within the normal range [6]. Heart rate did not change significantly across doses [6]. Another study looked at how the body handles the drug. After oral dosing, trazodone reached peak blood levels in about 10 to 30 minutes, and its half-life was roughly 5 hours [1]. That short window is why timing matters so much. ## Trazodone for Cats Dosage: What Owners Need to Know ### Who Decides the Dose Your veterinarian decides the dose. There is no universal trazodone for cats dosage chart by weight that you should follow on your own. Published feline studies have used a range of doses, and the right one for your cat depends on age, weight, kidney and liver health, other medications, and the level of sedation needed. In one study, cats received oral trazodone at 5 mg/kg [1]. In another, cats received 50 mg tablets, which worked out to a mean dose of about 12.1 mg/kg [2]. A third study used 50 mg, 75 mg, and 100 mg doses in healthy adult cats [6]. These numbers show how wide the range can be. They are not a dosing chart for your cat. If you are comparing this to other weight-based feline medications, the same principle applies. Drugs like [methimazole for hyperthyroidism](/knowledge/veterinary-medicine/calculators-clinical-tools/methimazole-cat-dose-feline-hyperthyroidism-dose-and-monitoring) or [insulin glargine for diabetes](/knowledge/veterinary-medicine/calculators-clinical-tools/insulin-glargine-for-cats-feline-diabetes-dose-and-glucose-curve) are dosed by weight and lab results, and trazodone is no different. ### How Much to Give Per Pound Owners often search for trazodone for cats dosage per pound. The honest answer is that your veterinarian converts your cat's weight into a milligram dose based on the target effect and your cat's health. A 10-pound cat and a 10-pound cat with kidney disease may get very different prescriptions. Do not use a trazodone cats dose calculator you find online. Those tools cannot see your cat, cannot check bloodwork, and cannot account for drug interactions. Your prescription label is the only dose that applies to your cat. ### How to Give It Trazodone is given by mouth, usually as a tablet or a compounded liquid. Compounded formulations are common in cats because they are easier to give and can be flavored [1]. Follow the label exactly. You can give it with a small amount of food or a treat if your veterinarian says that is fine. If your cat vomits right after the dose, do not give a second dose without calling your veterinarian first. ### Timing Before a Vet Visit or Travel Timing is everything with trazodone. In one study, sedation was measured 1 hour after oral administration [3]. Peak blood levels appeared within about 10 to 30 minutes in another study [1]. Most veterinarians ask owners to give the dose about 1 to 2 hours before the appointment or trip. Ask your veterinarian for the exact timing for your cat. If you give it too early, the effect may wear off before you arrive. If you give it too late, your cat may not be calm when you need it. ### What to Do About a Missed Dose If you miss the dose and the appointment is still ahead, call your veterinarian for guidance. Do not double up. If the event has passed, skip the missed dose and wait for the next scheduled one. Never give two doses close together to make up for a missed one. ## Side Effects: What to Watch For Most cats tolerate trazodone well, but side effects can happen. The table below covers the common and serious ones. | Side effect | How common or serious | What to do | |---|---|---| | Sleepiness and sedation | Expected and common. This is the goal. | Let your cat rest in a quiet, safe space. | | Mild drop in blood pressure | Uncommon and usually mild. In one study, a small average drop stayed within normal limits [6]. | Watch for weakness or wobbliness. Call your vet if it seems excessive. | | Vomiting or drooling | Uncommon. Often related to the taste of the tablet. | Give with a small treat if approved. Call your vet if it repeats. | | Agitation or restlessness | Uncommon. Some cats become more alert instead of calmer. | Do not give more medication. Call your vet. | | Slow or shallow breathing | Serious. | Call your veterinarian or an emergency clinic right away. | | Collapse, extreme weakness, or unresponsiveness | Serious. | Treat as an emergency. Go to a veterinary hospital now. | A study of trazodone combined with gabapentin found that blood tests stayed within normal ranges, though plasma protein rose slightly in one group [2]. That is reassuring for healthy cats, but it does not replace monitoring by your veterinarian. ## Who Should Not Take Trazodone and What Interacts With It Trazodone is not right for every cat. Your veterinarian may avoid it or adjust the plan if your cat has liver disease, kidney disease, heart disease, low blood pressure, or a history of seizures. Pregnant or nursing cats need a veterinarian's judgment as well. Drug interactions matter. Trazodone is often combined with gabapentin for stronger sedation, and research shows the combination increases sedation scores with mild cardiovascular effects in healthy cats [2]. When trazodone and gabapentin were given together, the amount of trazodone available in the body dropped, which is why your veterinarian may adjust doses when combining them [1]. Tell your veterinarian about every medication, supplement, and topical product your cat receives. This includes flea and tick products, heartworm preventives, and anything you give for appetite or behavior. If your cat takes other behavior medications, your veterinarian needs to know before prescribing trazodone. ## Overdose: When to Call a Veterinarian or Poison Control An overdose of trazodone can cause dangerous sedation, low blood pressure, tremors, and heart rhythm problems. If you think your cat received too much, do not wait for symptoms. Call for help immediately. Call your veterinarian or an emergency veterinary hospital right away. You can also contact a pet poison control hotline. Have the medication bottle, the strength of the tablet, and your cat's weight ready. Signs that need emergency care include extreme drowsiness that you cannot rouse your cat from, trouble breathing, a very slow heart rate, vomiting, tremors, or collapse. If your cat ate an entire bottle or an unknown number of tablets, treat it as an emergency. For other poisoning concerns, such as a cat that ate chocolate, a [chocolate toxicity calculator for cats](/knowledge/veterinary-medicine/toxicology-and-food-safety/chocolate-toxicity-calculator-for-cats) can help you estimate risk while you call for advice. ## Limitations and When to Contact a Veterinarian Online dose information cannot replace your veterinarian's prescription. Every cat is different, and the right dose depends on weight, health conditions, other medications, and the goal of sedation. Individual cases need a veterinarian's assessment. Contact your veterinarian the same day if your cat vomits the dose, seems agitated instead of calm, or has mild wobbliness that concerns you. These are not usually emergencies, but they may mean the dose needs adjusting. Go to an emergency clinic now if your cat is difficult to wake, breathing slowly or with effort, has a very slow heartbeat, collapses, or shows tremors or seizures. These signs suggest a serious reaction or an overdose. For routine questions about timing, missed doses, or whether trazodone is right for an upcoming visit, call your veterinary clinic during normal hours. Planning ahead gives your veterinarian time to adjust the plan before the stressful event. ## Frequently Asked Questions ### Can I give my cat trazodone without a prescription? No. Trazodone is a prescription medication, and giving it without veterinary guidance is unsafe. Your veterinarian needs to examine your cat, review health history, and check for drug interactions before prescribing it. ### How long does trazodone last in cats? The effects typically last several hours, and the drug's half-life in cats is around 5 hours [1]. Your cat may seem sleepy for part of the day after a dose. Ask your veterinarian how long to expect effects based on your cat's dose. ### Can I use a dog trazodone dose for my cat? No. Dog doses and cat doses are not interchangeable. Cats metabolize medications differently, and using a dog chart can lead to underdosing or a dangerous overdose. Always use the dose your veterinarian prescribes for your cat. ### What if trazodone does not calm my cat? Call your veterinarian. Some cats need a different dose, a different medication, or a combination approach. Do not give extra medication on your own. Your veterinarian can adjust the plan before the next stressful event. ### Is trazodone safe to combine with gabapentin in cats? Veterinarians do combine them, and research shows the combination increases sedation in healthy cats [2]. The combination can also change how much trazodone stays in the body, so your veterinarian should set both doses [1]. Never combine them without veterinary direction. ### Can trazodone be used for everyday anxiety in cats? Trazodone is usually used for short-term, event-based sedation instead of daily long-term anxiety treatment. If your cat has ongoing anxiety, your veterinarian may recommend a different plan, including behavior modification or other medications. Discuss your cat's specific situation with your veterinarian. ## Related Articles - [Mirtazapine Appetite Stimulant: Dose for Cats and Dogs Guide](/knowledge/veterinary-medicine/calculators-clinical-tools/mirtazapine-appetite-stimulant-dose-for-cats-and-dogs-guide) - [Methimazole Cat Dose: Feline Hyperthyroidism Dose and Monitoring](/knowledge/veterinary-medicine/calculators-clinical-tools/methimazole-cat-dose-feline-hyperthyroidism-dose-and-monitoring) - [Amoxicillin Dog Cat Dose: Broad-Spectrum Antibiotic Weight-Based Guide](/knowledge/veterinary-medicine/calculators-clinical-tools/amoxicillin-dog-cat-dose-broad-spectrum-antibiotic-weight-based-guide) - [Insulin Glargine for Cats: Feline Diabetes Dose and Glucose Curve](/knowledge/veterinary-medicine/calculators-clinical-tools/insulin-glargine-for-cats-feline-diabetes-dose-and-glucose-curve) - [Chocolate Toxicity Calculator For Cats](/knowledge/veterinary-medicine/toxicology-and-food-safety/chocolate-toxicity-calculator-for-cats) - [Trazodone Dog Anxiety Dose: Behavioral Sedation and Surgery Calm](/knowledge/veterinary-medicine/calculators-clinical-tools/trazodone-dog-anxiety-dose-behavioral-sedation-and-surgery-calm) ## References 1. [Pharmacokinetic, sedative, and physiological effects of oral compounded formulations of trazodone alone or in combination with gabapentin in male cats](https://pubmed.ncbi.nlm.nih.gov/37098097/). Journal of veterinary pharmacology and therapeutics, 2023. 2. [Trazodone-gabapentin association increases sedation scores with mild hemodynamic and echocardiographic impact in healthy cats](https://pubmed.ncbi.nlm.nih.gov/39701182/). Topics in companion animal medicine, 2025. 3. [Evaluation of the sedative properties of oral trazodone, gabapentin or their combination in healthy cats](https://pubmed.ncbi.nlm.nih.gov/39475768/). Journal of feline medicine and surgery, 2024. 4. [Oral use of anxiolytic, sedative, and anaesthetic medications in domestic cats (Felis catus): A scoping review](https://pubmed.ncbi.nlm.nih.gov/42431357/). Veterinary journal (London, England : 1997), 2026. 5. [Do cats receiving pre-appointment trazodone experience less stress during veterinary visits?](https://pubmed.ncbi.nlm.nih.gov/42005338/). Veterinary evidence, 2025. 6. [Effect of oral administration of trazodone on physiological and echocardiographic variables in cats](https://pubmed.ncbi.nlm.nih.gov/40130526/). Journal of feline medicine and surgery, 2025. ## Further Reading - [American Veterinary Medical Association: First Aid Tips for Pet Owners](https://www.avma.org/resources-tools/pet-owners/emergencycare/first-aid-tips-pet-owners) - [Merck Veterinary Manual: Cat Owners](https://www.merckvetmanual.com/cat-owners) - [Cornell Feline Health Center: Health Information](https://www.vet.cornell.edu/departments-centers-and-institutes/cornell-feline-health-center/health-information)