Metronidazol - Pharmacological action Metronidazole is an anti protozoal agent. It is believed that the mechanism of action is associated with DNA damage-sensitive microorganisms. Active against Trichomonas vaginalis, Gardnerella vaginalis, Giardia lamblia, Entamoeba histolytica, and obligate anaerobic bacteria (including Bacteroides spp., Fusobacterium spp.). Aerobic bacteria are resistant to metronidazole. In combination with amoxicillin Metronidazole is active against Helicobacter pylori. It is...