+CYP2C9 (often simply "2C9") is a key [cytochrome P450 enzyme](/wiki/Cytochrome_P450) in humans. It plays a significant role in metabolizing many drugs, including common anticoagulants like [warfarin](/wiki/Warfarin). Variations in its gene can profoundly influence individual drug response and dosage.
+## See also
+- [Drug Metabolism](/wiki/Drug_Metabolism)
+- [Pharmacogenomics](/wiki/Pharmacogenomics)
+- [Enzyme](/wiki/Enzyme)