Cytochrome P450 2D6, commonly referred to as CYP2D6 is one of the key enzymes in the liver responsible for metabolizing approximately 25% of clinically used medications. Ultrarapid metabolizers have an increased rate of converting prodrugs, such as codeine and tramadol, into their active forms (morphine and O-desmethyltramadol, respectively). This rapid conversion can lead to a […]