It increases digestion and used as nourishing diet for convalescents, mainly in bowel illness. Arrowroot is also popular in traditional medicine for its demulcent properties [11, 12]. However, there are no available medicinalclaimsabout antidiarrhealactivity and cytotoxicity of this plant. Tat is why we are interested in examining the antidiarrheal and cytotoxic activities of methanolic extract of Maranta arundinacea L. leaves.