QT prolongation is caused by:: (A) Quinidine, (B) Omeprazole, (C) Lidocaine, (D) Penicillin
Answer is A. Ans. a. QuinidineRef: Goodman Gilman 12th e/P. 821Drugs Causing QT prolongation:Antihistamines: Class la (Quinidine) and Class IIICisaprideAntipsychotics: Ziprasidone, sertindole, quetiapine, haloperidol, etc.Antidepressants: Tricyclic antidepressants like amitriptyline, SSRI like fluoxetineAntibiotics: Fluoroquinolones, erythromycinAntihistaminics: Astemizole, terfenadineAntifungals: KetoconazoleAntimalarials: Chloroquine, quinine, halofantrineAntivirals: Amantadine