ASCP ASCP-MLT Question Answer
Though it may not be required, TDM should still be used to confirm adequate dosing. Genotyping does not make TDM redundant.
A PM will metabolize the drug more slowly and therefore will need lower doses. CYP2D6 metabolizes many different drugs; it is not associated with just one class of drugs. Anytime a drug is taken that competes for the same metabolizing enzyme as another drug, there is potential for the concentrations of both drugs to be increased.
A patient has been characterized as a CYP2D6 poor metabolizer (PM) after genotyping. Which of the following statements is not true?