Regarding CYP450 2D6 poor metabolizers.
Ahdieh
Harry
H
D019389:Cytochrome P-450 CYP2D6 / Q000378:metabolism*; D006801:Humans; D053858:Metabolic Networks and Pathways / Q000187:drug effects / Q000502:physiology; D010111:Oxymorphone / Q000493:pharmacokinetics / Q000627:therapeutic use; D010146:Pain / Q000188:drug therapy / Q000201:enzymology
D010111:Oxymorphone; D019389:Cytochrome P-450 CYP2D6