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Switch medication from fluoxetine to citalopram.[1] [2]
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 citalopramNo wash-out period is needed.
- Day 1: start citalopram/escitalopram the next day in low dosage of 10 mg/day, resp. 5 mg/day.
- Day 14: increase dosage of citalopram/escitalopram to normal, i.e. 20 mg/day, resp. 10 mg/day.
More information- Fluoxetine has a very long elimination time; phasing out fluoxetine is therefore not necessary.
- Occurrence of the serotonin syndrome is not likely, but theoretically possible, so caution is necessary.
- Fluoxetine inhibits CYP2C19, CYP2D6 and CYP3A4, which metabolize (es)citalopram.
- ↑ 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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