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• W2061037701 abstract "The efficacy and kinetics of the combination chloroquine plus sulfadoxine‐pyrimethamine (CQ + SP), given sequentially and simultaneously, were investigated in 32 patients with acute uncomplicated Plasmodium falciparum malaria in Palawan Island, the Philippines. Group 1 with 11 patients received oral CQ 25 mg/kg bw over 3 days followed by a single dose of SP (three tablets 250 mg S + 25 mg P) on Day 4 (CQ0 + SP4). Group 2 with 21 patients received a loading dose of CQ 10 mg/kg plus a single dose of SP three tablets on Day 0, and doses of CQ on Days 1 and 2 (CQ0 + SP0). Patients were followed‐up for 28 days until after the clinical and parasitological remission of the disease. Serum samples for CQ, des‐ethylchloroquine (DCQ), S and P levels were assayed by high‐pressure liquid chromatography with UV and spectrofluorometric detection (HPLC‐SF) to determine effective therapeutic concentrations achieved. Parasite and fever clearance times (PCT and FCT) in Group 1 were 48 and 33.5 h, respectively, and 39 and 24 h in Group 2. The parasite elimination half‐life (p t 1/2 ) in the CQ + SP0 group was 2.5 h, significantly shorter than the CQ + SP4 group of 5.7 h ( P =0.006). Late‐treatment failures (R I) were observed in 2/11 patients in Group 1 and in 2/21 patients in Group 2. Serum CQ and DCQ concentrations were effectively adequate. Group 1 pharmacokinetic parameters showed a median maximum concentration ( C max ), area under the curve (AUC) and elimination half‐life ( t 1/2 ) of 285 ng/ml, 2299 day ng/ml and 5.7 days for CQ, and 89 ng/ml 1845 day ng/ml and 7.3 days for DCQ, respectively. SP was not assayed in Group 1 because of very limited time points. In Group 2, the median C max , AUC and t 1/2 for CQ and DCQ were at 283 ng/ml 1980 day ng/ml and 5.9 days for CQ and 220 ng/ml, 2680 day ng/ml and 8.5 days for DCQ, respectively. For S and P, the median C max , AUC and t 1/2 were at 169 μg/ml, 2758 day ng/ml and 10.9 days for sulfadoxine, and 591 ng/ml, 3029 day ng/ml and 2.9 days for pyrimethamine, respectively. Both regimens were well tolerated with a minimum of side‐effects, mainly nausea and vomiting. The combination CQ + SP administered simultaneously on Day 0 is more efficacious than when administered sequentially. In the absence of an alternative treatment for acute uncomplicated malaria, this combination is well tolerated, and has an advantage over CQ or SP monotherapy, especially in countries where one drug is still highly effective." @default.
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• W2061037701 title "Pharmacokinetics of sequential and simultaneous treatment with the combination chloroquine and sulfadoxine-pyrimethamine in acute uncomplicated Plasmodium falciparum malaria in the Philippines" @default.
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• W2061037701 doi "https://doi.org/10.1046/j.1365-3156.2002.00899.x" @default.
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