Abstract:The safety, tolerance, and pharmacokinetics of a small unilamellar liposomal formulation of amphotericin B (AmBisome) administered for empirical antifungal therapy were evaluated for 36 persistently febrile neutropenic adults receiving cancer chemotherapy and bone marrow transplantation. The protocol was an open-label, sequential-dose-escalation, multidose pharmacokinetic study which enrolled a total of 8 to 12 patients in each of the four dosage cohorts. Each cohort received daily doses of either 1.0, 2.5, 5.… Show more
“…122 At high doses there is non-linear clearance with saturation of the reticuloendothelial system and redistribution of the drug in other tissues. 123 Differences in the action of the reticuloendothelial system between individuals can be the reason for the higher intersubject variability of AmBisome 1 pharmacokinetic parameter, 40-75% of relative standard deviation, in comparison with 15-25% obtained with Fungizone 1 . 100 The profile of AmBisome 1 is reported to be superior to that of Fungizone 1 .…”
“…122 At high doses there is non-linear clearance with saturation of the reticuloendothelial system and redistribution of the drug in other tissues. 123 Differences in the action of the reticuloendothelial system between individuals can be the reason for the higher intersubject variability of AmBisome 1 pharmacokinetic parameter, 40-75% of relative standard deviation, in comparison with 15-25% obtained with Fungizone 1 . 100 The profile of AmBisome 1 is reported to be superior to that of Fungizone 1 .…”
“…Unlike the deoxycholate formulation, the second type is a lipid-based formulation with low nephrotoxicity [4,5]. However, cost and other factors limit its widespread use [6][7][8]. Much effort has been made to develop costeffective delivery systems with reduced AmB toxicity.…”
“…2 The introduction of liposomal formulations of amphotericin B could reduce, but not eliminate these adverse events completely. 2,3 Azole derivatives such as itraconazole and the recently introduced voriconazole demonstrated acceptable or good efficacy against Aspergillus and were better tolerated. 4 -7 Azoles, however, are substrates for and inhibitors of cytochrome 450.…”
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