| to = doxepin
| stop =
{{stopDuloxetineTCAdecrease25p3d}}
| start =
* '''Day 9:'''start administration of doxepin in a low dosage of 25 mg/day.* '''Day 16:''' increase the dosage of doxepin to 50 mg/day.{{TCAincrease25p3d}}| info = * Duloxetine slows the metabolism of doxepin by CYP2D6.* {{theorSSTCAplasmalevelmonitoring}}
}}