system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
Which of the following drugs can cause torsades'de pointers?
assistant
The correct answer is  class 1A agents, class 3 antiarrythymic agents commonly produce torsades de pointes class 1 a- quinidine, disopyramide, procainamide class 1b agents doesnt produce torsades pointes-eg lidocaine, phenytoin, mexiletine, tocainide flecainide is class 1c REF.Essentials of Pharmacology KD Tripathi 8th ed.