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Drugs To Avoid
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There are a number of drugs which are known to prolong the QT-interval and to cause heart rhythm abnormalities, particularly in patients with the long-QT syndrome (LQTS).

Patients with LQTS should always inquire their physician or other health care provider about the risk of any medication suggested or prescribed for them. In addition, LQTS-patients should always inform their doctor(s) and dentist(s) about their disease and make sure they know there are many medications which are contraindicated in this condition.

Arizona Center for Research and Education on Therapeutics (Arizona CERT) and the University of Lausanne provide  complete and up-to-date lists of drugs that prolong the QT-interval.

Drug market	Resource/Download
Worldwide	www.qtdrugs.org
Schweiz Suisse Switzerland	Liste von Medikamenten, die bei Patienten mit verlängertem QT-Intervall kontraindiziert sind (.pdf) 92 KB Liste von Medikamenten, die bei Patienten mit verlängertem QT-Intervall kontraindiziert sind (.doc) 136 KB Liste des médicaments contre-indiqués chez les patients avec une prolongation de l’intervalle QT (.pdf) 92 KB Liste des médicaments contre-indiqués chez les patients avec une prolongation de l’intervalle QT (.doc) 136 KB Last update: August 2008 For more details see: Abriel H, Schläpfer J, Keller DI, Gavillet B, Buclin T, Biollaz J, Stoller R, Kappenberger L: Molecular and clinical determinants of drug-induced long QT syndrome: an iatrogenic channelopathy; Swiss Med Wkly 2004;134:685–694.

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