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Metronidazole
Pronounced met-ro-NY-dah-zole
Brand names: Flagyl
Type: Nitroimidazole antibiotic · All Antibiotics & Infection Medicines
What Metronidazole is used for
- Bacterial vaginosis
- Certain gut infections including C. difficile
- Abdominal and pelvic infections
- Parasite infections of the gut
- Rosacea (applied to skin)
◆ Kidney note
No dose change is usually needed for kidney function, but breakdown products can build up in severe kidney failure, so dialysis patients are monitored.
Common side effects
- Metallic taste
- Nausea
- Dark urine color
- Headache
- Loss of appetite
Important cautions
- Alcohol must be avoided during treatment and shortly after, as the combination causes severe nausea and vomiting
- Long courses can cause nerve tingling or numbness — report these symptoms
How it comes
Tablets, capsules, liquid, injection (hospital), skin gel and cream, vaginal gel. This guide lists forms only — it never lists strengths or doses.
Related medicines — Antibiotics & Infection Medicines
Please note: This page is a patient-education summary, not medical advice, and it deliberately contains no doses. Medicines affect everyone differently — always follow your own prescription and talk to your doctor or pharmacist before starting, stopping or changing any medicine.