From the Department of Pharmacotherapy (Clinical Pharmacy). Faculty of Pharmacy. Tehran University of Medical Sciences
Abstract: (4789 Views)
Since the introduction of our local manufacturing of terfenadine, we have
observed and expressed our concern about a small but increasing number of serious
ventricular arrhythmias associated with the use of this non sedating antihistamine.
In January 1997 a case of torsade de pointes ventricular tachycardia was detected
in a previously healthy woman taking terfenadine with erythromycin.
Electrocardiography revealed QT interval prolongation and QRS widening. One
hour after emergency room admission, her arrhythmia degenerated to ventricular
fibrillation and she died of cardiac arrest. Episodes of torsade de pointes are most
likely the result of the quinidine-like action of terfenadine. Dosage restriction and
awareness of the clinical conditions and drug interactions capable of inhibiting the
metabolism of terfenadine are essential for prevention of this serious reaction.
Type of Study:
case report |
Subject:
Pharmacology