Translations:Cytochrome P450/17/en

Main article: Drug metabolism

P450s are the major enzymes involved in drug metabolism, accounting for about 75% of the total metabolism. Most drugs undergo deactivation by P450s, either directly or by facilitated excretion from the body. However, many substances are bioactivated by P450s to form their active compounds like the antiplatelet drug clopidogrel and the opiate codeine.