Fluoxetine-doxepine
From Psychiatrienet
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Switch medication from fluoxetine to doxepin.[2] [3]
Stop fluoxetine - Gradually reduce dosage of fluoxetine to a maximum of 20 mg/ day, when this dosage is > 20 mg/day.
- When a dosage of 20 mg/day is reached, stop administration.
Start doxepinCaution is necessary for at least four weeks.
- Day 1: start administration of doxepin in a low dosage of 25 mg/day.
- Day 15: increase dosage of doxepin to 50 mg/day.
- Day 28: increase dosage of doxepin to 75 mg/day.
More information- Fluoxetine slows the metabolism of doxepin via CYP2D6.
- Desmethylfluoxetine has a halflife of at least 1 week: it takes therefore 1 month for elemination.
- Start low, go slow for doxepin.
- ↑ 1.0 1.1 1.2 1.3 1.4 KNMP; Informatorium Medicamentorum 2023; Monografie "doxepine" (Dutch)
- ↑ Switches are based on literature references on this page and expert opinions of the authors. The authors have used pharmacokinetic and receptor affinity properties to determine the switch schedules
- ↑ Stahl, S. M. (2013). Stahl's essential psychopharmacology: Neuroscientific basis and practical applications (4th ed.). Cambridge University Press.
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