Comparative study of mefloquine and sulphadoxine-pyrimethamine for malaria prevention among pregnant women with HIV in southwest Nigeria

Objective: To compare the effectiveness of mefloquine and sulphadoxine-pyrimethamine as intermittent preventive therapy for malaria among pregnant women with HIV. Methods: The present randomized, controlled, prospective, open-label study enrolled women with HIV who had reached at least 16 weeks of pregnancy attending prenatal clinics at secondary and tertiary health facilities in South West Nigeria between January 1 and August 31, 2016. Block randomization was used to assign patients to treatment with mefloquine or sulphadoxine-pyrimethamine for malaria prophylaxis. The primary outcome was malaria parasitemia at delivery. Data were compared with the chi(2) and t tests on a per-protocol basis. Results: Of 142 women enrolled and randomized equally to each group, 131 (92.3%) completed the study (64 in the mefloquine group and 67 in the sulphadoxinepyrimethamine group). Blood-sample malaria parasites were isolated from 6 (9%) and 5 (7%) patients in the mefloquine and sulphadoxine-pyrimethamine groups, respectively, at enrolment, and 6 (9%) and 9 (13%) patients in the mefloquine and sulphadoxine-pyrimethamine groups, respectively, at delivery; the differences between the groups was not significant at enrolment (P=0.693) or delivery (P=0.466). Conclusion: Outcomes following prophylactic use of mefloquine for intermittent preventive therapy for malaria among pregnant women with HIV were comparable to sulphadoxine-pyrimethamine treatment; mefloquine is a feasible alternative therapy.