Metronidazole vaginal gel is mainly used to treat an infection called bacterial vaginosis (BV) , which happens when certain bacteria in the vagina overgrow and upset the normal balance.

What it’s used for

  • Treatment of bacterial vaginosis in people who have started their periods (post‑menarchal females).
  • BV often causes:
    • Thin, gray‑white discharge with a fishy odor
    • Mild irritation or no pain at all
    • It is not a classic “yeast infection,” and needs different treatment.

The gel is an antibacterial (nitroimidazole) medicine that works by killing or suppressing the bacteria linked with BV (such as Gardnerella and certain anaerobes).

How it’s usually used

  • Put one applicatorful of gel into the vagina, most often at bedtime.
  • Typical courses:
    • 0.75% gel: once daily for about 5 days.
* Some 1.3% gels: higher strength, used once daily for **shorter** regimens (1–3 days) depending on brand.
  • It is for vaginal use only , not to be taken by mouth.

Common side effects and cautions

  • Possible local effects:
    • Vaginal irritation, itching, burning
    • Yeast overgrowth (thrush) after treatment in some people
  • Possible body‑wide effects (less common with gel than pills):
    • Stomach upset, nausea, metallic taste, headache
  • Avoid alcohol while using metronidazole products and for a short time after, because of the risk of unpleasant reactions (nausea, flushing, fast heartbeat).

When to talk to a doctor urgently

Stop and seek medical help if you:

  • Have severe lower belly pain, fever, or feel very unwell (could suggest PID or another serious infection).
  • Notice heavy bleeding, sores, or severe burning.
  • Think you might be pregnant, or you are breastfeeding and unsure if this product is right for you.

This gel treats bacterial vaginosis only ; it does not treat sexually transmitted infections like chlamydia, gonorrhea, or trichomoniasis, and it is not a contraceptive.

Quick forum-style note

Many people online describe being prescribed metronidazole vaginal gel after a BV diagnosis when they report a fishy odor and discharge, especially when oral metronidazole upset their stomach, because the gel tends to cause fewer whole‑body side effects.

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Metronidazole vaginal gel is an antibacterial medicine used to treat bacterial vaginosis, a common vaginal infection causing discharge and odor. Learn how it’s used, typical courses, and key precautions.

Information gathered from public forums or data available on the internet and portrayed here.