QT prolongation is caused by:-: (A) Quinidine, (B) Omeprazole, (C) Lidocaine, (D) Penicillin
Answer is A. Drugs causing QT prolongation are: Cisapride Astemizole Terfanidine Class 1A anti-arrythmic drugs: Quinidine, Procainamide. Class 3 anti-arrythmic drugs: Bretylium, Ibutilide