All the following causes QT prolongation except: (A) Cisapride, (B) Quinidine, (C) Terfenadine, (D) Cetrizine
Answer is D. Drugs producing QT prolongation- class 1a, class 3 antiarrhythmic agents terfinadine, tricyclic antidepressants, neuroleptics, prokinetics Ref: KD tripathi 8th ed