Metronidazole is an antibiotic that is used to treat a wide variety of infections caused by bacteria or parasites. It works by stopping the growth of certain bacteria and parasites. Some of the infections that metronidazole is commonly used to treat include:

• Skin infections
• Rosacea
• Mouth infections, including infected gums and dental abscesses
• Bacterial vaginosis
• Pelvic inflammatory disease
• Infected insect bites
• Skin ulcers
• Bed sores and wounds
• Infections of the reproductive system
• Gastrointestinal (GI) tract infections
• Heart, bone, joint, lung, blood, and nervous system infections
• Sexually transmitted diseases (STDs)

Metronidazole is available in several forms, including oral tablets, capsules, creams, gels, lotions, and vaginal gels. It can also be given by injection, but this is usually only done in a hospital.

Its important to take metronidazole as your doctor tells you, and to finish the full course of treatment even if you start feeling better. Do not stop taking it without talking to your doctor, as stopping too soon or skipping doses can cause the infection to not be completely treated and the bacteria may become resistant to antibiotics.

Its worth noting that metronidazole should not be used to treat viral infections, such as the common cold or flu, as it only treats certain bacterial and parasitic infections. Additionally, its important to avoid drinking alcohol while taking metronidazole, as it can cause side effects such as feeling and being sick, stomach pain, hot flushes, difficulty breathing, a pounding heartbeat, and headaches.