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Drugs that may prolong the QT interval.
| Therapeutic class | Drugs involved |
|---|---|
| Class Ia antiarrhythmics | Hydroquinidine, disopyramide |
| Class III antiarrhythmics | Amiodarone, sotalol, ibutilide |
| Class IV antiarrhythmics | Bepridil |
| Antibiotics (macrolis) | Erythromycin |
| Synthetic antimalarial agents | Halofantrine |
| Anti leishmania agents and trypanocides | Pentamidine diisethionate |
| H1 antihistaminics | Mizolastine: this drug slightly lengthens the QT interval |
