| to = amitriptyline
| stop =
{{stopDuloxetineTCAdecrease25p3d}}
| start =
* '''Day 9-15:''' wash-out period of one week is necessary.* '''Day 16:''' start administration of amitriptyline in a low dosage of 25 mg/day. {{TCAincrease25p3d}}| info = * Start low, go slow for amitriptyline!* Duloxetine is a moderate inhibitor of CYP2D6, which metabolizes amitriptyline. {{TCAplasmalevelmonitoring}}