Metronidazole

Metronidazole hos excellent activity against anaerobic bacteria, including Bacteroi­des fragilis and against several intestinal protozoa. it hos no activity against aerobic or facultative anaerobic bacteria. it is the agent of choice for bacterial vaginosis, tri­chomoniasis, giardiasis, amoebiasis and balantidiosis. Nausea, metallic taste. and dis­ulfiram-like effect with alcohol are side effects, which may be less common with the related agents tinidazole and nimorazole.