* '''Before day 1:''' gradually reduce dosage of mirtazapine to a maximum of 30 mg/ day.
* '''Day 1:''' reduce a dosage of 30 mg/day to 15 mg/day.
* '''Day 8:''' stop administration of mirtazapine.
| start =
* '''Day 1:''' simultaneously start citalopram/escitalopram in a normal dosage of 20 mg/day, respectively 10 mg/day.* '''Day 8:''' stop administration of mirtazapine and only continue administration of citalopram/ escitalopram. }}