IT IS ONE OF THE LARGE SERIES OF NITROIMIDAZOLES WITH POTENT ANTI-ROTOZOAL ACITIVITY AGAINST E.HISTOLYTICA, G.LAMBLIA AND T.VAGINALIS. SATRANIDAZOLE IS ABOUT 3-4 TIMES MORE POTENT THAN OTHER NITROIMIDAZOLES AGAINST TRICHOMONAS VAGINALIS AND AT LEAST 2 TIMES MORE POTENT IN GIARDIASIS AS COMPARED TO OTHER NITROIMIDAZOLES. IT PROVED TO BE SUPERIOR IN ACTIVITY AGAINST STRAINS OF B.FRAGILIS AND FUSOBACTERIUM LIKE OTHER NITROIMIDAZOLES, THE NITRO GROUP IS RESPONSIBLE FOR TRAGETTING THE DNA OF THE PROTOZOA OR ANAEROBES. IT PRODUCES EXTENSIVE DNA DAMAGE CHARACTERIZED BY HELIX DESTABILIZATION AND STRAND BREAKAGE.