Verapamil acts by –
Correct Answer: Calcium channel blockers
Description: Ans. is 'b' i.e., Calcium channel blocker o Calcium channel blockers delay the recovery of `L' type calcium channel from inactivated state to resting state --> depression of pacemaker activity and conduction - negative ionotropic, chronotropic and dromotropic effect. o Amongst CCBs, recovery of Ca' channel is delayed maximally by verapamil and to a lesser extent diltiazem. o DHPs do not delay the recovery - no negative chronotropic, ionotropic or bathantotropic effect, infact sho acting DHPs like nifedipine can cause tachycardia and paradoxically increase the frequency of angina sho acting DHPs should not be used in angina.
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