* '''Day 8:''' stop administration of dosulepine .
| start =
No wash-out period is needed.
* '''Day 9:''' simultaneously start administration of trazodone in a dosage of 100-150 mg/day.
* '''Day 16:''' increase administration of trazodone.
| info =
* Occurrence of the serotonin syndrome is theoretically possilble, so caution is necessary.}}