| stop = * '''Before day 0:''' gradually reduce dosage of trazodone to a maximum of 150 mg/day{{StopSSRI, when this dosage is > 150 mg/day. * '''Day 1:''' reduce dosage of trazodone to 75 mg/day.* '''Day 8:''' stop administration of trazodone.SNRI}}| start = {{StartAntidepressant}}* A wash-out period is not necessary.| info =* '''Day 1:''' simultaneously start administration of Safe target dose venlafaxine in a normal dosage of = 75 mg/day.* '''Day 8:''' stop administration of trazodone and continue administration of venlafaxine.| info = * Occurrence of serotonin syndrome is theoretically possible, so caution is necessary.{{theorSS}}