Which of the following drug is an enzyme inducer?
Correct Answer: Rifampicin
Description: (Ref: Katzung, 14th ed. pg. 59; KDT, 6th ed. pg. 27)Enzyme induction involves microsomal enzyme in liver as well as in other organ.It increases the rate of metabolism 2 - 4 fold. Therefore, effect of drug decreases.Enzyme inhibitors also involves microsomal enzyme.It inhibits the microsomal enzyme, which decreases drug metabolism rate and increases duration of drug action.Let us take an example of warfarin, which is used as an anti thrombotic agent.#Warfarin + enzyme inducer = Thrombosis (warfarin metabolism increases and action of warfarin diminishes rapidly and thrombotic condition arises).#Warfarin + enzyme inhibitor = Bleeding (warfarin metabolism decreases and duration of warfarin action increases and patient develops bleeding tendency)Drugs which are enzyme inducers and enzyme inhibitors Enzyme inducersEnzyme inhibitorsGriseofulvinPhenylbutazonePhenytoinErythromycinRifampicinAllopurinol, AmiodaroneSmokingCiprofloxacinCarbamazipineOmeprazolePhenobarbitoneCimetidineBarbiturateKetoconazoleDDTValproateRemembered as: GPRS Cell Phone Battery DeadMn: PEACOCK ValaMost of the anti epileptic are enzyme inducers except VALPROATE (an inhibitor)Most of the antimicrobial are enzyme inhibitors except GRISEOFULVIN (an Inducer)
Category:
Pharmacology
Get More
Subject Mock Tests
Practice with over 200,000 questions from various medical subjects and improve your knowledge.
Attempt a mock test nowMock Exam
Take an exam with 100 random questions selected from all subjects to test your knowledge.
Coming SoonGet More
Subject Mock Tests
Try practicing mock tests with over 200,000 questions from various medical subjects.
Attempt a mock test now