Trazodone Dosage for Dogs

Generic name: Trazodone HCl

🔒 Prescription RequiredAntidepressant / Anxiolytic

⚡ QUICK ANSWER

The typical trazodone dosage for dogs is 2–5 mg per kg (approximately 1–2.3 mg per pound), given every 8–12 hours. For anxiety, vets often recommend giving it 1 to 2 hours before a stressful event. Trazodone is a prescription medication — always follow your veterinarian's exact instructions.

Trazodone Dosage Calculator for Dogs

Enter your dog's weight to get a personalized dose estimate.

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What is Trazodone?

Trazodone is a prescription medication that has become increasingly popular in veterinary medicine for managing anxiety and stress in dogs. It belongs to a class of drugs called serotonin antagonist and reuptake inhibitors (SARIs), which help stabilize mood and reduce anxiety without the heavy sedation associated with older tranquilizers.

Veterinarians commonly prescribe trazodone for dogs who experience situational anxiety — such as during thunderstorms, fireworks, car travel, veterinary visits, or grooming appointments. It is also frequently used for dogs with generalized anxiety, separation anxiety, and post-surgical restlessness. Because it is short-acting and generally well-tolerated, it has become a first-line choice for many behavior-related concerns.

Trazodone is only available by prescription, and the correct dose depends on your dog's weight, the reason it is being prescribed, and your dog's overall health. It should never be given without veterinary supervision, and it should not be combined with other serotonergic drugs without professional guidance.

How Trazodone Works in Dogs

Trazodone works by blocking serotonin reuptake in the brain while also blocking certain serotonin receptors. The result is a calming effect that reduces anxiety without causing the deep sedation seen with traditional sedatives. The medication usually starts working within 1 to 2 hours after being given orally, and its effects last between 8 and 12 hours. This is why it is often dosed 1 to 2 hours before a stressful event and then repeated as needed throughout the day.

Trazodone Dosage Chart by Weight

Typical dose range: 2–5 mg per kg, Every 8–12 hours.

Weight (lb)	Weight (kg)	Dose (min)	Dose (max)
5 lb	2.3 kg	4.6 mg	11.5 mg
10 lb	4.5 kg	9.0 mg	22.5 mg
15 lb	6.8 kg	13.6 mg	34.0 mg
20 lb	9.1 kg	18.2 mg	45.5 mg
25 lb	11.3 kg	22.6 mg	56.5 mg
30 lb	13.6 kg	27.2 mg	68.0 mg
40 lb	18.1 kg	36.2 mg	90.5 mg
50 lb	22.7 kg	45.4 mg	113.5 mg
60 lb	27.2 kg	54.4 mg	136.0 mg
75 lb	34 kg	68.0 mg	170.0 mg
100 lb	45.4 kg	90.8 mg	227.0 mg

⚠️ Chart is a general guide. Your veterinarian may prescribe a different dose based on your dog's health, age, and condition.

How Often to Give Trazodone

Trazodone is typically given every 8 to 12 hours, or as directed by your veterinarian. For situational anxiety, it is often given 1 to 2 hours before the stressful event. For daily anxiety, it may be prescribed on a regular schedule. The maximum daily dose depends on your dog's weight and condition, and your vet will determine the right schedule for your dog.

Available Formulations

▸50 mg tablet
▸100 mg tablet
▸150 mg tablet
▸Compounded liquid (for small dogs)

Common Uses in Dogs

▸Situational anxiety (storms, fireworks, travel)
▸Separation anxiety
▸Veterinary visit stress
▸Post-surgical restlessness and confinement
▸Generalized anxiety (with behavioral therapy)

Safe vs. Unsafe Forms of Trazodone

✓ Safe

Trazodone prescribed by your veterinarian for your specific dog, following the exact dose and schedule provided.

✗ Unsafe

Giving trazodone without a prescription or without veterinary guidance. This medication is not appropriate for every dog and requires professional evaluation.

✗ Unsafe

Combining trazodone with MAO inhibitors, SSRIs, or other serotonin-boosting drugs. This can lead to serotonin syndrome, a potentially life-threatening condition.

✗ Unsafe

Giving trazodone to dogs with certain heart conditions, liver disease, or kidney disease without veterinary approval.

Possible Side Effects

•Sedation and drowsiness
•Vomiting or diarrhea
•Increased appetite
•Drooling
•Loss of coordination
•Rare: serotonin syndrome with severe symptoms

Important Warnings

⚠Prescription required — never give trazodone without veterinary approval.
⚠Do not combine with MAO inhibitors, SSRIs, or tramadol without veterinary guidance.
⚠Use with caution in dogs with liver or kidney disease.
⚠Do not stop abruptly after long-term use — taper under veterinary supervision.
⚠Not approved for use in pregnant or nursing dogs.

When to Call Your Veterinarian

Contact your veterinarian or an emergency veterinary clinic immediately if any of the following occur:

🚨Your dog shows signs of serotonin syndrome: agitation, confusion, rapid heart rate, tremors, or high body temperature.
🚨Your dog becomes excessively sedated or difficult to wake.
🚨You accidentally give more than the prescribed dose.
🚨Your dog's anxiety does not improve or worsens after starting trazodone.
🚨Your dog develops vomiting, diarrhea, or loss of appetite that persists.
🚨You are considering combining trazodone with any other medication or supplement.

Frequently Asked Questions

What is the dosage of trazodone for dogs?▾

2–5 mg per kg every 8–12 hours, prescribed by your veterinarian. Dosage depends on the reason for use and your dog's health.

What is the trazodone dosage for dogs per pound?▾

Approximately 1–2.3 mg per pound. A 50 lb dog typically receives 50–115 mg per dose.

What is the dosage of trazodone for dogs for anxiety?▾

For anxiety, vets often prescribe 2–5 mg per kg, given 1–2 hours before the stressful event. Follow your vet's exact instructions.

Can I give my dog trazodone every day?▾

Only if prescribed by your veterinarian. Long-term use requires monitoring and should not be stopped abruptly.

What happens if I give my dog too much trazodone?▾

Signs include severe sedation, vomiting, tremors, and serotonin syndrome. Contact an emergency vet immediately.

Can trazodone and gabapentin be given together?▾

Yes, vets sometimes prescribe both together for anxiety and pain, but only under veterinary supervision.

How long does trazodone take to work in dogs?▾

Trazodone usually starts working within 1 to 2 hours after being given and lasts 8 to 12 hours.

Is trazodone safe for long-term use in dogs?▾

It can be used long-term under veterinary supervision. Regular check-ups may be needed.

Sources

▸U.S. Food and Drug Administration (FDA) — Veterinary Medication Safety
▸Merck Veterinary Manual
▸Plumb's Veterinary Drug Handbook
▸American Veterinary Medical Association (AVMA)

⚠️ Disclaimer

This information is provided for educational purposes only. It is not a substitute for professional veterinary advice. Dosage depends on your dog's weight, age, health condition, and other factors. Always consult a licensed veterinarian before giving any medication to your dog. If you suspect an overdose or a medical emergency, contact your veterinarian or an emergency veterinary clinic immediately.