| to = venlafaxine
| stop =
* 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.{{stopFluoxetine1}}
| start =
No wash-out period is needed.
* '''Day 12:''' start venlafaxine the next day in low dosage of 37,5 mg/day.* '''Day 2122:''' increase dosage of venlafaxine to normal, 75 mg/day.* '''Day 2829:''' gradually increase dosage of venlafaxine, if necessary.
| info =
* Fluoxetine has a very long elimination time; phasing out fluoxetine is therefore not necessary. {{longt1/2fluvox}}
* {{theorSS}}
* Fluoxetine and norfluoxetine inhibit de the metabolism of venlafaxine via CYP2D6.
}}