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The pharmacokinetics of itraconazole oral solution were measured in seven patients receiving chemotherapy followed by autologous bone marrow transplantation for leukaemia or lymphoma. Patients received 5 mg/kg/day itraconazole either as a once or twice daily dose. Drug concentrations reached steady state by day 15, in both groups. The mean pre-dose itraconazole serum concentration at hour 0, day 8 was 385 ng/mL in the od group and 394 ng/mL in the bd group, rising to 762 and 845 ng/mL by day 15, respectively. The mean AUCs for 0–24 h on day 8, 15 and 22 were 17,310 and 13,302 ng/mL/h, 24,476 and 25,154 and 22,621 and 21,423, for the od and bd groups, respectively. Thus serum concentrations of itraconazole suitable for antifungal prophylaxis can be attained in neutropenic patients, with the administration of an oral solution in a dosage of 5 mg/kg as either an od or bd schedule, following …