All drugs have the potential to cause adverse effects. Occasionally,serious adverse effects are not identified in preclinical studiesand become apparent only when a drug is in widespread clinicaluse a particular problem with adverse events that arerare and result in few symptoms. One example of relevance toclinicians and regulatory agencies is drug-induced prolongationof the QT interval. During the past few years, many drugs havebeen removed from the market or required to include "black box"warnings on their labels because of the potential for QT-intervalprolongation. The list of causative medications is daunting,and . . . [Full Text of this Article]
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From the Department of Medicine, University of Toronto (B.A.L., D.N.J.); and the Divisions of Geriatric Medicine (B.A.L.), General Internal Medicine (D.N.J.), and Clinical Pharmacology (B.A.L., D.N.J.), Sunnybrook and Women's College Health Sciences Centre both in Toronto.
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N Engl J Med 2005;
352:301-304, Jan 20, 2005.
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