What is Metronidazole?
Metronidazole is an antibiotic that helps treat bacterial vaginosis (BV), a vaginal infection characterized by unusual discharge with a strong fishy smell. BV is caused by an imbalance of good and bad bacteria, and while it can go away without treatment, Metronidazole usually helps speed up this process.
How does Metronidazole work?
Metronidazole is an antibiotic that kills bacteria. It does this by stopping bacterial cells from creating their own proteins, which is essential for bacterial survival. Without these proteins, the bacteria can’t function and eventually expire.[1]
Will I get side effects using Metronidazole?
Yes, there’s a chance of getting side effects, although not everyone will experience them. Some side effects include:
- Nausea
- Vomiting
- Stomach problems
These side effects should go away when you stop treatment. If they persist, let your doctor know.
What is Metronidazole used for?
Metronidazole is used to treat a range of conditions, including:
- Bacterial vaginosis
- Rosacea
- Diarrhea
Depending on the condition you’re treating, the formula and dose will differ. For example, Metronidazole gel is used for rosacea, while tablets and vaginal gel are used for BV.
What doses of Metronidazole are there?
Metronidazole comes in one dose of 500mg. You usually take one tablet twice a day for five to seven days. You might need a second treatment course if your infection persists.
Treated trusted source:
- Weir CB, Le JK. Metronidazole. [Updated 2023 Jun 26]. In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2025 Jan
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