Furadantin belongs to antibacterial drugs of broad spectrum, bactericide. It inhibits the synthesis of DNA and RNA, proteins, the formation of cell membranes, inhibits the aerobic metabolism. Furadantin is very effective against gram negative and gram-positive bacteria, including Streptococcus spp., Staphylococcus spp., Shigella flexneri, Shigella dysenteriae, Shigella sonnei, Shigella boydii, Escherichia coli.