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Jpn Circ J. 1999 May;63(5):421-2.

Clarithromycin associated with torsades de pointes.

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Department of Internal Medicine, Karatsu Red Cross Hospital, Saga, Japan.


Two cases of QT prolongation and torsades de pointes (TdP) are presented. The patients had been taking clarithromycin (400 mg/day) for respiratory disease. Although erythromycin is reportedly associated with TdP, this is the first report of clarithromycin associated with TdP in the absence of other drugs already known to produce QT prolongation.

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