Fluconazole failure in the treatment of invasive mycoses.

Fluconazole is a recently licensed antifungal agent that has gained widespread use in the medical community. Despite a lack of controlled trials in invasive fungal infections, this agent is often prescribed because of ease of administration and concern over amphotericin B toxicity. Three cases of systemic fungal infections in which fluconazole use resulted in unambiguous microbiologic and clinical failure are reported.