Drugs that do not increase QT interval: (PGI Nov 2010): (A) Amiodarone, (B) Quinidine, (C) Digitalis, (D) Amitryptyline
Answer is C. Ans: C (Digitalis) "Digitalis cause shortening of QT interval"- KDT 6th/495Drugs that Prolong Q-T intervalAntiarrhythmicsQuinidineQ, procainamideQ, disopyramide. propafenone, AmiodaroneQ, SotalolAntimicrobialQuinine, mefloquine, artemisinin, halofan- trine, sparfloxacin, gatifloxacinAntihistaminicTerfenadineQ, astemizole, ebastineAntidepressantsAmitryptyline & other tricyclicsAntipsych oticsThioidazine, risperidoneProkineticsCisaprideQ