Dose-equivalence by class

Antidepressant equivalent doses

Antidepressant equivalent doses express each drug — for example citalopram, sertraline and fluoxetine — as a fluoxetine-equivalent daily dose from peer-reviewed averages for acute depression; it is an educational population estimate, not a tapering or withdrawal guide and not a prescription.

Reference table

Each drug expressed as the dose equivalent to fluoxetine 20 mg/day, from peer-reviewed averages for acute depression. Population estimate, not a tapering guide. Educational, not a prescription.

DrugEquivalent dose
Fluoxetine20 mg
Citalopram20 mg
Sertraline49.3 mg
Escitalopram9 mg
Paroxetine17 mg
Fluvoxamine71.7 mg
Venlafaxine74.7 mg
Mirtazapine25.5 mg
Amitriptyline61.2 mg
Clomipramine58.1 mg
Nortriptyline50.5 mg

Common switches

Citalopram to Sertraline

Citalopram 30 mg maps to about 73.9 mg of Sertraline (modeled estimate, educational — not a prescription).

Fluoxetine to Sertraline

Fluoxetine 30 mg maps to about 73.9 mg of Sertraline (modeled estimate, educational — not a prescription).

Citalopram to Escitalopram

Citalopram 30 mg maps to about 13.5 mg of Escitalopram (modeled estimate, educational — not a prescription).

Open the interactive equivalent-dose tool

See the formula and its verbatim source quote in Methods

Educational PK model: not clinical guidance. Confirm any dose change with a prescriber or pharmacist.