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This guide is general education for pet owners. If your pet has urgent symptoms, possible poisoning, injury, breathing trouble, collapse, severe pain, or sudden decline, contact a licensed veterinarian or local emergency service.
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Trazodone for Dogs: Anxiety, Post-Op Confinement & Triage
Clinical Classification & Indications
- Drug Class: Serotonin Antagonist and Reuptake Inhibitor (SARI)
- Approved Uses: Situational anxiety (fireworks, thunderstorms, travel, hospital visits) and behavioral calming for strict post-operative confinement following orthopedic surgery (TPLO, fracture repairs).
Mechanism of Action (Pharmacodynamics)
Exerts dual actions on serotonergic neurotransmission: potent antagonism of post-synaptic 5-HT2A receptors combined with mild inhibition of presynaptic serotonin reuptake, producing functional sedation and anxiolysis.
Adverse Reactions & Side Effect Profile
Common / Expected Side Effects
Transient sedation, mild ataxia, lethargy, increased appetite, mild vomiting or diarrhea.
Emergency Red Flag Reactions
Serotonin Syndrome: agitation, severe muscle tremors, hyperthermia, tachycardia, vocalization, dilated pupils, seizures (especially if combined with other serotonergic medications).
Clinical Contraindications & Interactions
- Do Not Use In: Concurrent use with Monoamine Oxidase Inhibitors (MAOIs like Selegiline/Anipryl) or other strong serotonergic agents (tramadol, fluoxetine). Use with caution in severe hepatic or cardiac disease.
Strict Rule S1 Veterinary Prescription Directive
VETERINARY DIRECTIVE: Trazodone takes approximately 1 to 2 hours to achieve peak sedative effect and lasts 6 to 12 hours. Always conduct a trial dose on a calm day before an anticipated stress event to assess individual patient sedation levels. Never administer human pharmaceutical products or adjust dosages without direct examination and bloodwork by a licensed Doctor of Veterinary Medicine (DVM).
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