This result signifies that this patient has [1 copy of a normal function allele (*_)] [X copies of a decreased function allele (*_)] [X copies of a no function allele (*_)]. Based on the genotype result this patient is predicted to be a normal metabolizer of CYP2D6 substrates. There is no reason to selectively adjust the dose of most medications that are metabolized by CYP2D6. Please consult a clinical pharmacist for more information about how CYP2D6 metabolic status influences drug selection and dosing.