Azole antifungals are the first-line of treatment or prophylaxis for many fungal infections. They are often administered long-term (weeks to months), which can be associated with a number of adverse effects.
Voriconazole can induce QTc prolongation and life-threatening arrhythmias. Dr Pasternak and colleagues in Israel found that QTcP >60 ms occurred in around a third of children receiving voriconazole. They recommend ECG monitoring for all patients, and correction of electrolyte imbalances (especially potassium) before initiating voriconazole treatment.
Safety and tolerability data for long-term use of fluconazole are scarce. Dr Davis and colleagues have published a study of 124 coccidioidomycosis patients in California and found that around half (52%) experienced significant side effects, in particular dry skin, hair loss and fatigue.