title: Dose ranging studies of new artemisinin-piperaquine fixed combinations compared to standard regimens of artemisisnin combination therapies for acute uncomplicated falciparum malaria.
abstract: To determine the optimum dose of artemisinin-piperaquine combination therapies for acute uncomplicated Plasmodium falciparum malaria, we examined 7 candidate regimens in 411 patients admitted to the Bangkok Hospital for Tropical Diseases. The studies were performed from May 2005 to October 2005 and November 2005 to June 2006. We compared 3-day courses of artesunate-mefloquine, artemether-lumefantrine (Coartem) and of dihydroartemisinin-piperaquine (Artekin) as reference antimalarial treatments, with candidate regimens using 2-3 day courses of artemisinin-piperaquine, Artequick. Initially, patients receiving each of the regimens had a rapid clinical and parasitological response. All treatments were well tolerated and no serious adverse effects occurred. The 28-day cure rates were < 80% for the 2-day treatments with artemisinin-piperaquine at 2.4 mg/kg and 14.4 mg/kg, respectively, in the first study period and artemisinin-piperaquine at 3.2 mg/kg and 16.0 mg/kg, respectively, but > 98% for the 3-day regimens. These results suggest that a 3-day course of artemisinin-piperaquine at 3.2 mg/kg and 16.0 mg/kg, respectively, deserve further evaluation as an alternative treatment for multidrug-resistant P. falciparum malaria.
authors.affiliation: Department of Tropical Hygiene, Faculty of Tropical Medicine, Mahidol University, 420/6 Ratchawithi Road, Bangkok 10400, Thailand. tmsks@mahidol.ac.th
authors.forename: Srivicha
authors.initials: S
authors.lastname: Krudsood
authors.forename: Noppadon
authors.initials: N
authors.lastname: Tangpukdee
authors.forename: Vipa
authors.initials: V
authors.lastname: Thanchatwet
authors.forename: Polrat
authors.initials: P
authors.lastname: Wilairatana
authors.forename: Siripan
authors.initials: S
authors.lastname: Srivilairit
authors.forename: Nantaporn
authors.initials: N
authors.lastname: Pothipak
authors.forename: Song
authors.initials: S
authors.lastname: Jianping
authors.forename: Li
authors.initials: L
authors.lastname: Guoqiao
authors.forename: Gary M
authors.initials: GM
authors.lastname: Brittenham
authors.forename: Sornchai
authors.initials: S
authors.lastname: Looareesuwan
mesh_terms: D000208:Acute Disease; D000293:Adolescent; D000328:Adult; D000890:Anti-Infective Agents / Q000008:administration & dosage*; D000962:Antimalarials / Q000008:administration & dosage* / Q000009:adverse effects; D037621:Artemisinins / Q000008:administration & dosage* / Q000009:adverse effects; D004359:Drug Therapy, Combination; D005260:Female; D006801:Humans; D016778:Malaria, Falciparum / Q000188:drug therapy*; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies; D011804:Quinolines / Q000008:administration & dosage* / Q000009:adverse effects; D013785:Thailand; D010879:Piperazines
chemical_list: D000890:Anti-Infective Agents; D000962:Antimalarials; D037621:Artemisinins; D011804:Quinolines; C031327:artemisinin; C034759:piperaquine; D010879:Piperazines