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Stelzer, D.; Weber, A.; Ihle, F.; Matthes, S.; Ceelen, F.; Zimmermann, G.; Kneidinger, N.; Schramm, R.; Winter, H.; Zoller, M.; Vogeser, M.; Behr, J. and Neurohr, C. (2018): Posaconazole liquid vs tablet formulation in lung transplant recipients. In: Mycoses, Vol. 61, No. 3: pp. 186-194

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Posaconazole is an extended-spectrum triazole antifungal used in the treatment and prophylaxis of Aspergillus infections. It is available as oral suspension (POS-Liq) and delayed-release tablets (POS-Tab). The aim of this longitudinal, retrospective study was to compare the clinical effectiveness, toxicity and pharmacokinetics of POS-Liq vs POS-Tab in lung transplant recipients (LTx-recipients), who were treated with both formulations subsequently. Twenty-four consecutive LTx-recipients with 191 documented posaconazole trough levels (PTLs) for POS-Liq or POS-Tab were included. The administered daily doses were 300mg for POS-Tab and 600mg (prophylaxis) or 800mg (therapy) for POS-Liq. Target PTLs were 700ng/mL (prophylaxis) and 1250ng/mL (therapy). The overall prophylactic and therapeutic response rates were 78% and 67%, respectively. No cases of hepatotoxicity or QT-prolongation were observed with either formulation. The achieved target PTLs were tripled under POS-Tab compared to POS-Liq with fewer risk factors for sub-therapeutic PTLs. Concomitant administration of POS-Tab significantly reduced the tacrolimus concentration-to-dose ratio (P=.001). We suggest the use of POS-Tab is appropriate for prophylaxis and therapy of Aspergillus infections in LTx-recipients, since POS-Tab displayed more reliable PTLs with no added adverse events. However, we recommend regular drug monitoring for POS-Liq and for therapy with POS-Tab and that immunosuppressant levels are monitored closely when the posaconazole formulation is switched.

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