Figure 2. Phenotype translation and nortriptyline dose recommendations of the CPIC and DPWG based on CYP2D6 activity scores.
Solid bars: CPIC interpretation of phenotype and dosing recommendation. Hatched bars: DPWG interpretation of phenotype and dosing recommendation. Red: poor metabolizer, Orange: intermediate metabolizer, Green: normal metabolizer, Blue: ultra-rapid metabolizer. Note: CPIC provides no specific dose adjustment for amitriptyline but recommends to consider increasing the dose and using therapeutic drug monitoring to guide dose adjustments.