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Torsade de Pointes and QT Prolongation Among Antifungal Triazoles: A Real-World, Retrospective, Observational, Pharmacovigilance Analysis of the FDA Adverse Event Reporting System (FAERS) Database

Chen L, Liu MJ, Wang S, Yang D, Ding NN, Zhang J

Cardiovascular toxicology, 2025

18,940 participants

Abstract

The widespread use of antifungal triazoles has increasingly been associated with cardiovascular adverse events (AEs), particularly torsade de pointes (TdP) and QT prolongation. Understanding the characteristics of TdP/QT prolongation associated with antifungal triazoles is crucial for their safe and effective administration. In the FAERS database from 2004 to 2024, a total of 18,940 patients with antifungal triazoles were extracted for disproportionality analyses to reflect the degree of association between the TdP/QT prolongation and different antifungal triazoles, and the logistic regression analysis was used to identify potential influencing factors. Additionally, the study examines concomitant medication use in patients who experienced TdP/QT prolongation. Among the overall AEs cases of triazoles, the incidence rate of TdP/QT prolongation was around 2%. A disproportionality analysis indicated that antifungal triazoles were significantly associated with the occurrence of TdP/QT prolongation (reporting odds ratio (ROR) = 7.67 [7.06-8.33], p 30 days vs. ≤ 30 days, OR [95%CI] = 0.23 [0.06-0.89], p = 0.034) had higher risks of death and life-threatening. Finally, we screened out 15 types of concomitant medications that increase the risk of TdP/QT prolongation from triazoles, including Ondansetron, Amiodarone, Levofloxacin, and etc.,which were clearly known to have the side effect of prolonging the QT interval. The TdP/QT prolongation caused by triazoles is a drug safety issue…

How strong is the evidence?

Evidence Hub reads this as a cohort study, done in people. Its evidence level is 3 of 5 (Moderate · trial / cohort / secondary analysis). Trials without a large randomized design, cohorts and secondary analyses give moderate evidence. Reported size: 18,940 participants or records.

How the five levels of evidence work. The level is assigned automatically from the abstract and can be wrong, so check the paper.

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