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Authors

Objective:

To compare efficacy and safety of primaquine regimens currently used to prevent relapses by P. vivax.

Methods:

A systematic review was carried out to identify clinical trials evaluating efficacy and safety to prevent malaria recurrences by P. vivax of primaquine regimen 0.5 mg / kg / day for 7 or 14 days compared to standard regimen of 0.25 mg/kg/day for 14 days. Efficacy of primaquine according to cumulative incidence of recurrences after 28 days was determined. The overall relative risk with fixed-effects meta-analysis was estimated.

Results:

For the regimen 0.5 mg/kg/day/7 days were identified 7 studies, which showed an incidence of recurrence between 0% and 20% with follow-up 60-210 days; only 4 studies comparing with the standard regimen 0.25 mg/kg/day/14 days and no difference in recurrences between both regimens (RR= 0.977, 95% CI= 0.670 to 1.423) were found. 3 clinical trials using regimen 0.5 mg/kg/day/14 days with an incidence of recurrences between 1.8% and 18.0% during 330-365 days were identified; only one study comparing with the standard regimen (RR= 0.846, 95% CI= 0.484 to 1.477). High risk of bias and differences in handling of included studies were found.

Conclusion:

Available evidence is insufficient to determine whether currently PQ regimens used as alternative rather than standard treatment have better efficacy and safety in preventing relapse of P. vivax. Clinical trials are required to guide changes in treatment regimen of malaria vivax.

Lina Marcela Zuluaga-Idarraga, Malaria Group, School of Medicine. University of Antioquia. Medellin, Colombia Epidemiology and Biostatistics Group, CES University. Medellin, Colombia

Teacher-Researcher, Division of Public Health, Faculty University CES

Maria-Eulalia Tamayo Perez, Grupo Académico de Epidemiología Clínica, Facultad de Medicina. Universidad de Antioquia. Medellín, Colombia

Docente-Investigadora, Facultad de Medicina

Daniel Camilo Aguirre-Acevedo, Academic Group for Clinical Epidemiology, Faculty of Medicine. University of Antioquia. Medellin, Colombia

Teacher-Researcher, School of Medicine
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Received 2015-09-17
Accepted 2015-12-01
Published 2024-06-14

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