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| to = amitriptyline
| stop =
{{stopfluoxetine1stopFluoxetine1}}
| start =
Caution is necessary for at least four weeks.
* '''Day 25:''' start administration of amitriptyline in a low dosage of 25 mg/day.
* '''Day 15:''' increase dosage of amitriptyline to 50 mg/day.
* '''Day 20 and after:''' gradually increase dosage of amitriptyline if necessary.
| info =
* {{TCAplasmalevelmonitoring}}
* Fluoxetine and norfluoxetine slow the metabolism of amitriptyline via CYP2D6.
* Start low, go slow for amitriptyline.