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This randomized, open-label study of patients in India with visceral leishmaniasis (VL) investigated the effect of food on sitamaquine and desethyl-sitamaquine pharmacokinetics. Patients were randomized to receive oral sitamaquine, 2 mg/kg/day, once a day for 21 days across four cohorts (n = 41) (fasted/fed, fed/fasted, fed/fed, and fasted/fasted) over two periods (days 1-10 and 11-21), or intravenous amphotericin B (AmB), 1 mg/kg every other day for 30 days (n = 20). Mean day 21 pharmacokinetics across the four cohorts were sitamaquine, area under curve (AUC)((0-τ)) = 6,627-8,903 ng.hr/mL, AUC((0-16)) = 4,859-6,633 ng.hr/mL, maximum plasma concentration (C(max)) = 401-570 ng/mL, apparent terminal half-life (t(1/2)) = 18.3-22.8 hr, time to reach C(max) (t(max)) = 3.5-6 hr; and desethyl-sitamaquine, AUC((0-τ)) = 2,307-3,163 ng.hr/mL, C(max) = 109-154 ng/mL, t(1/2) = 23.0-27.9 hr, t(max) = 2-10 hr, with no significant food effect. On-therapy adverse events were observed for sitamaquine in 4 (10%) of 41 patients and for AmB in 17 (85%) of 20 patients. The final clinical cure (day 180) was 85% (95% confidence interval = 70.8-94.4%) for sitamaquine and 95% (95% confidence interval = 75.1-99.9) for AmB. Sitamaquine can be taken regardless of food intake, was generally well tolerated, and showed potential efficacy in patients with visceral leishmaniasis.

the american journal of tropical medicine and hygiene

Pharmacokinetics of Oral Sitamaquine Taken with or without Food and Safety and Efficacy for Treatment of Visceral Leishmaniais: A Randomized Study in Bihar, India