A drug used for ventricular arrhythmias caused by digoxin?: (A) Verapamil, (B) Diltiazem, (C) quinidine, (D) Phenytoin
Answer is D. Ventricular arrhythmias caused by digoxin are best treated with lidocaine, followed by phenytoin-class 1 antiarhhmatics REF Essentials of Medical Pharmacology KD Tripathi 8th ed.