Kalra, Bhupinder Singh2007-02-302009-05-292007-02-302009-05-292007-02-30Kalra BS. Cytochrome P450 enzyme isoforms and their therapeutic implications: an update. Indian Journal of Medical Sciences. 2007 Feb; 61(2): 102-16http://imsear.searo.who.int/handle/123456789/6880246 references.Clinicians should be cognizant of potential drug drug interactions and become familiar with the substrates, inhibitors and inducers of the common enzymatic pathways responsible for drug metabolism. Our knowledge of and ability to predict drug interactions have improved with growing understanding of substrates, inhibitors and inducers of cytochrome P450 (CYP-450) isoenzymes. These isoenzymes are a major determinant of the pharmacokinetic behavior of numerous drugs. In addition to inhibition and induction, microsomal drug metabolism is affected by genetic polymorphisms, age, nutrition, hepatic disease and endogenous chemicals. Prescribing physicians by understanding the unique characteristics of these isoenzymes may better anticipate and manage drug drug interactions.engCytochrome P-450 Enzyme System --geneticsDrug InteractionsEnzyme InductionEnzyme InhibitorsHumansIsoenzymesMicrosomes --metabolismPolymorphism, GeneticJournal Article