Novel iodotyramides with para-substituted benzoic acids were synthesized via electrophilic aromatic substitutions and amide coupling via N,N'-diisopropylcarbodiimide (DIC) in dimethylformamide (DMF).All derivatives were in vitro screened against U-937 macrophages and Plasmodium falciparum, Leishmania panamensis and Trypanosoma cruzi protozoan parasites.The hemolytic activity was evaluated on human red blood cells (RBC).Compounds N-(4-hydroxy-3,5-diiodophenethyl)-4-methylbenzamide and N-(3,5-diiodo-4-methoxyphenethyl)-4-methoxybenzamide were the most active against L. panamensis with an effective concentration 50 (EC 50 ) of 17.9 and 17.5 μg mL -1 , respectively; while compounds N- (3,5-diiodo-4-methoxyphenethyl)-4-methylbenzamide and N-(3,5-diiodo-4-methoxyphenethyl)-4-methoxybenzamide were the most active for T. cruzi with EC 50 values of 23.75 and 6.19 μg mL -1 , respectively.In contrast, all derivatives showed high activity against P. falciparum with EC 50 < 25 μg mL -1 , except compound N-(4-hydroxy-3,5-diiodophenethyl)-benzamide.No compound was hemolytic over RBC.This report represents the importance of novel iodotyramides as anti-parasites agents.