The valorization of traditional medicine involves pharmacological researches on medicinal plants. Thus, to effectively fight malaria, the major public health problem in Togo, pharmacological, phytochemical and toxicological studies were carried out on Senna occidentalis. The compilation of the results on ethnobotanical surveys carried out at CERFOPLAM from 2010 to 2013 on malaria and its affiliated symptoms lead to selecting Senna occidentalis in order to confirm the characteristics attributed to it. Various tests were carried out on aqueous and hydroethanolic extracts 50:50 of the plant. The antiplasmodial activity in vitro was carried out on cultivated parasites (Plasmodium falciparum: wild strain) according to the optical micro-test. Phytochemical screening was characterized by thin layer chromatography followed by colorimetric tests. The preliminary toxicity was carried out on Artemia salina then the in vitro antioxidant potential of the extracts was measured by the reduction test of the 2, 2-diphenyl-1-picryl