Metronidazole is used to treat bacterial infections in different areas of the body. It is also used to treat infections caused by protozoa (eg, trichomoniasis and amebiasis) and infections caused by bacteria that do not need oxygen to survive. Learn what metronidazole is used for, including its role in treating bacterial and parasitic infections, skin conditions, and more. Explore benefits, uses, and precautions. Metronidazole is primarily used to treat: bacterial vaginosis, pelvic inflammatory disease (along with other antibacterials like ceftriaxone), pseudomembranous colitis, aspiration pneumonia, rosacea (topical), fungating wounds (topical), intra-abdominal infections, lung abscess, periodontal disease, amoebiasis, oral infections, giardiasis. What is metronidazole used for? Metronidazole is commonly used to treat the following infections caused by certain bacteria or parasites. Metronidazole may not be appropriate for some of. Metronidazole is a nitroimidazole antimicrobial that kills anaerobic bacteria and parasites via DNA-damaging free radicals. It treats trichomoniasis, amebiasis, and serious anaerobic infections, and prevents post-colorectal-surgery infection. Metronidazole treats a wide range of infections, from vaginal and parasitic to dental and skin conditions. Here’s what it’s used for and how it works. Metronidazole is used to treat a certain type of vaginal infection (bacterial vaginosis) in women who are not pregnant. Metronidazole is an antibiotic that works by stopping the growth of bacteria. Metronidazole is a prescription antibiotic medication prescribed for the treatment of a variety of parasitic and bacterial infections of the vagina, gynecological area, skin, intra-abdominal cavity, blood, bone, joint, nervous system, and heart. Metronidazole’s scope is specific. It covers anaerobic bacteria — bacteria that thrive in low-oxygen environments, involved in abdominal infections, certain dental infections, and some gynecological infections — and protozoa. Metronidazole is used to treat trichomoniasis, amebiasis, and serious anaerobic bacterial infections including abdominal, skin, gynecologic, and CNS infections.