Bacterial Vaginosis: Treatment, Recurrence and the Honest Numbers
Short answer: bacterial vaginosis is treatable, the first-line treatment is metronidazole, and symptoms usually ease within two to three days. The part nobody tells you is that treatment is only about 70–80% effective at one month, and recurrence is common.
That number is the most useful thing on this page. If you have had BV come back, you are not doing something wrong and you did not fail — the standard treatment simply has a high relapse rate, and knowing that changes how you approach it.
We sell supplements. A supplement is not a treatment for BV, and this page will not pretend otherwise. What follows is what the clinical literature actually says.
- Bacterial vaginosis
- Not an infection you catch, but an imbalance. The Lactobacillus species that normally dominate are displaced by anaerobic bacteria, and vaginal pH rises above 4.5.
- The classic sign
- A thin grey or white discharge with a strong fishy odour, often most noticeable after unprotected sex — because semen is alkaline at pH 7.2–8.0 and pushes pH further up. Itching is usually absent, which is one way it differs from thrush.
- Metronidazole
- The first-line antibiotic, targeting the anaerobic bacteria specifically. Symptom relief typically begins in 2–3 days. No alcohol during the course or for 48 hours afterwards — the combination can cause severe nausea, vomiting and a racing heart.
- The recurrence problem
- Antibiotic treatment is roughly 70–80% effective at one month, and relapse rates thereafter are high. Treatment also frequently triggers a secondary yeast infection, because it does not spare the lactobacilli either.
- Secnidazole
- A single-dose alternative to a multi-day metronidazole course.
- Boric acid
- Studied as a vaginal suppository and compared against metronidazole for non-inferiority in the BASIC trial. Second-line, and toxic if swallowed.
- Lactic acid gel
- Studied as an alternative for recurrent BV in the VITA trial — an attempt to restore acidity directly rather than kill bacteria.
Why it keeps coming back
The cycle is mechanical, and understanding it removes a lot of self-blame:
- Anaerobic bacteria overgrow, pH rises above 4.5, odour appears.
- Metronidazole clears the anaerobes — and takes lactobacilli with them.
- With lactobacilli depleted, the environment is less defended than before treatment.
- Either the anaerobes return, or Candida takes the opening and you get thrush instead.
This is why the useful question is not "how do I get rid of it" but "how do I rebuild what the antibiotic removed" — which is exactly where live-strain probiotics have their best evidence, as an adjunct.
