Both artemether and artesunate have been shown to be superior to quinine for the treatment of severe falciparum malaria in Southeast Asian adults, although the magnitude of the superiority has been greater for artesunate than artemether. These two artemisinin derivatives had not been compared in a randomized trial. A randomized double blind trial in 370 adults with severe falciparum malaria; 186 received intramuscular artesunate (2.4 mg/kg immediately followed by 1.2 mg/kg at 12 hours then 24 hours then daily) and 184 received intramuscular artemether (3.6 mg per kilogram immediately followed by 1.8 mg per kilogram daily) was conducted in Viet Nam. Both drugs were given for a minimum of 72 hours. There were 13 deaths in the artesunate group (7 percent) and 24 in the artemether group (13 percent); P = 0.052; relative risk of death in the patients given artesunate, 0.54; (95 percent confidence interval 0.28-1.02). Parasitaemia declined more rapidly in the artesunate group. Both drugs were very well tolerated. Intramuscular artesunate may be superior to intramuscular artemether for the treatment of severe malaria in adults.

Paediatric formulations of artemisinin combination therapies (ACTs) have recently been developed for the treatment of children with falciparum malaria. Compared with conventional tablet formulations, the new non-tablet preparations have shown equivalent efficacy, safety, and tolerability in individual trials. We aimed to investigate whether objective evidence supports the development and use of paediatric ACTs. A systematic review identified seven studies involving 2515 children that were eligible for meta-analysis. Similar efficacy and safety were seen in pooled analyses of paediatric and conventional formulations. 23 (2.0%) of 1154 patients in the paediatric formulation groups and 19 (1.7%) of 1137 in the tablet formulation groups were not cured (RR 1.27, 95% CI 0.66-2.44). Despite similar overall tolerability, the tolerability of drug administration was improved for paediatric formulations as shown by significantly fewer patients with drug-induced vomiting (93 of 1018 and 114 of 837 patients; risk ratio [RR] 0.78, 95% CI 0.61-0.99), and drug-related gastrointestinal disorders (8 of 545 and 15 of 358 patients; RR 0.36, 95% CI 0.15-0.85). These data provide, for the first time, evidence for improved management of children by use of paediatric formulations, and support the further development and use of paediatric ACTs. Copyright 2010 Elsevier Ltd. All rights reserved.