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Serotonin antagonist & reuptake inhibitor (SARI)

Trazodone hydrochloride

Brand names: Molipaxin

Adult dose

Dose: Initial 150mg/day PO in divided doses, increase to 300mg/day; max 600mg/day inpatient
Route: PO
Frequency: divided or ON

Clinical pearls

  • Depression with anxiety/insomnia; agitation in dementia (low-dose nocte off-label per NICE NG97)
  • Less sexual dysfunction than SSRIs

Contraindications

  • Recent MI
  • Concurrent MAOI
  • Severe hepatic impairment
  • Hypersensitivity

Side effects

  • Sedation
  • Postural hypotension
  • Priapism
  • Cardiac arrhythmia
  • Hyponatraemia
  • Serotonin syndrome

Interactions

  • MAOIs
  • SSRIs/SNRIs
  • CNS depressants
  • CYP3A4 modulators
  • QT-prolonging drugs

Monitoring

  • Mood
  • Na+
  • ECG

Reference: BNF; NICE NG222/NG97; https://bnf.nice.org.uk/drugs/trazodone-hydrochloride/. Verify against your local formulary and the latest BNF before prescribing.

Related

Curated clinical cross-links plus same-class fallbacks.