Journal
INFECTION
Volume 45, Issue 6, Pages 737-779Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s15010-017-1042-z
Keywords
Polyenes; Amphotericin B lipid formulations; Liposomal amphotericin B; Itraconazole; Voriconazole; Echinocandins; Caspofungin; Critically ill; Renal replacement therapy; Extracorporeal membrane oxygenation
Categories
Funding
- University of Innsbruck
- Medical University of Innsbruck
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Because of the high mortality of invasive fungal infections (IFIs), appropriate exposure to antifungals appears to be crucial for therapeutic efficacy and safety. This review summarises published pharmacokinetic data on systemically administered antifungals focusing on co-morbidities, target-site penetration, and combination antifungal therapy. Amphotericin B is eliminated unchanged via urine and faeces. Flucytosine and fluconazole display low protein binding and are eliminated by the kidney. Itraconazole, voriconazole, posaconazole and isavuconazole are metabolised in the liver. Azoles are substrates and inhibitors of cytochrome P450 (CYP) isoenzymes and are therefore involved in numerous drug-drug interactions. Anidulafungin is spontaneously degraded in the plasma. Caspofungin and micafungin undergo enzymatic metabolism in the liver, which is independent of CYP. Although several drug-drug interactions occur during caspofungin and micafungin treatment, echinocandins display a lower potential for drug-drug interactions. Flucytosine and azoles penetrate into most of relevant tissues. Amphotericin B accumulates in the liver and in the spleen. Its concentrations in lung and kidney are intermediate and relatively low myocardium and brain. Tissue distribution of echinocandins is similar to that of amphotericin. Combination antifungal therapy is established for cryptococcosis but controversial in other IFIs such as invasive aspergillosis and mucormycosis.
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