Torsades List
Drugs with a Risk of Torsades de Pointes
Substantial evidence supports the conclusion that these drugs, when used as directed in labeling, can prolong the QT interval and can have a risk of Torsdes de pointes (TdP) in some patients.
Possible Torsades List
Drugs with a Possible Risk of Torsades de Pointes
Substantial evidence supports the conclusion that these drugs, when used as directed in labeling, can cause QT prolongation but there is insufficient evidence at this time that they have a risk of causing TdP.
Conditional Torsades List
Drugs with a Conditional Risk of Torsades de Pointes
Substantial evidence supports the conclusion that these drugs can prolong QT and have a risk of TdP but only under certain known conditions (e.g. excessive dose, drug interaction, etc.).