BV treatment means a short, defined course of antibiotics. The CDC-recommended options are oral metronidazole, metronidazole vaginal gel, or clindamycin vaginal cream. All three cure most acute episodes. Routine partner treatment isn't recommended, and alcohol is no longer restricted with metronidazole. Recurrence is common, so finishing the full course matters.
preferred; may cause mild nausea
intravaginal; less nausea than oral
intravaginal; safe in pregnancy
| Item | Value |
|---|---|
| Metronidazole 500 mg oral × 2/day × 7 days | first-line — preferred; may cause mild nausea |
| Metronidazole 0.75% gel 5 g × 5 nights | first-line — intravaginal; less nausea than oral |
| Clindamycin 2% cream 5 g × 7 nights | first-line — intravaginal; safe in pregnancy |
What is BV, and why does it need treating?
Bacterial vaginosis happens when the vaginal ecosystem tips out of balance. Normally, protective Lactobacillus species dominate and keep the environment acidic; in BV they're crowded out by an overgrowth of anaerobic bacteria. That shift produces the classic thin, grayish discharge and fishy odor, though plenty of cases cause no symptoms at all. BV is the most common vaginal condition in women ages 15 to 44 CDC.
It's not classified as a traditional STI, but it's clearly linked to sexual activity, and women who have never been sexually active rarely get it. Treating it isn't just about comfort. Losing those protective lactobacilli changes the vaginal environment in ways that raise the risk of acquiring or transmitting HIV and other STIs, and in pregnancy it raises the risk of preterm delivery and low birth weight. If you're not sure whether what you're noticing is BV at all, it's worth understanding the difference between yeast vs bv discharge and reviewing the typical bv symptoms before assuming.
How is BV treated? The exact regimens
The CDC recommends three first-line regimens, considered roughly equivalent. Your choice usually comes down to whether you'd rather take pills or use a vaginal product CDC STI Tx Guidelines, 2021:
- Metronidazole, oral: 500 mg by mouth twice daily for 7 days.
- Metronidazole gel (0.75%): one 5 g applicator inserted into the vagina once daily for 5 days.
- Clindamycin cream (2%): inserted into the vagina at bedtime for 7 days.
A couple of practical caveats matter here. Clindamycin cream and ovules are oil-based, so they can weaken latex condoms during and shortly after use; plan around that if you're relying on condoms. The old warning to avoid alcohol with metronidazole has been dropped. Under the 2021 guidelines, refraining from alcohol is unnecessary because there's no convincing evidence of a real reaction. You'll still see that warning circulating, so know it's outdated.
Which BV treatment should I choose?
| Regimen | How you take it | Course length | Things to know |
|---|---|---|---|
| Metronidazole (oral) | Pill, twice daily | 7 days | No alcohol restriction needed; can cause a metallic taste and nausea |
| Metronidazole gel | Vaginal applicator, once daily | 5 days | Less systemic side effect; some local irritation |
| Clindamycin cream | Vaginal, at bedtime | 7 days | Oil-based — can weaken latex condoms |
Cure rates for these standard antibiotics run about 80 to 90% of acute episodes SASGOG. None is dramatically better than the others, so use the one you'll actually finish and tolerate.
What treatment is actually like
BV is diagnosed from a simple sample: a self-collected swab, a urine cup, or a quick exam, with results usually back in a few days. It's free or low-cost at health departments, Planned Parenthood, and Title X clinics, so cost shouldn't be the barrier. You can read more about bv testing if you want to know exactly what the visit involves, or get tested to find a nearby option.
Once you start, finish the entire course even after symptoms clear. Stopping early is one of the biggest reasons BV comes roaring back. Oral metronidazole commonly causes a metallic taste in the mouth and some nausea; the vaginal products tend to cause more local irritation than whole-body side effects. None of this is dangerous, and clinics handle a BV diagnosis every single day. It's common and treatable, and it says nothing about you as a person.
Does my partner need treatment?
Routine treatment of male partners is not recommended, because studies haven't shown that treating a male partner lowers your chance of recurrence. That's different from most STIs, where partner treatment is essential. If you have a female partner, the picture is less settled, so raise the question with your clinician, since partners can share the same vaginal microbiome patterns. As a general rule with anything in this category, ask whether a partner needs treating so you don't pass it back and forth, but for typical BV with a male partner, the answer is usually no.
Follow-up, retesting, and recurrence
If your symptoms resolve, you don't need a routine test-of-cure. Even after a successful course, BV comes back in up to 60% of women within 12 months. When that happens three or more times in a year, it's defined as recurrent BV and usually calls for a different strategy: a months-long maintenance regimen, often a suppressive vaginal gel used a couple of times a week over a stretch of months, rather than just another single course. If you keep relapsing, don't keep repeating the same 5- or 7-day treatment and hoping. Talk to a clinician about maintenance.
What happens if BV goes untreated?
Some mild cases resolve on their own, but leaving symptomatic BV untreated carries real risks. The loss of protective lactobacilli makes the vaginal tissue more vulnerable to infection, and a meta-analysis of more than 30,000 women found BV raised the risk of acquiring HIV by about 60% Atashili et al., AIDS. It also raises the odds of acquiring or transmitting other STIs. In pregnancy, untreated BV is linked to preterm delivery and low birth weight, so pregnant people with symptoms should be evaluated and treated. Because BV can coexist with other infections, anyone with new symptoms after a recent partner change should also think about when to test after exposure for the STIs that need their own treatment.
Preventing BV going forward
There's no guaranteed way to prevent BV, but a few habits lower the odds and the recurrence rate:
- Don't douche. It strips out the protective lactobacilli and is one of the clearest reversible triggers.
- Use condoms correctly every time; consistent condom use is associated with less recurrence (just remember clindamycin cream can weaken latex).
- Limit the number of partners, since new or multiple partners shift the vaginal microbiome.
- Keep up with routine STI testing, because BV raises STI risk and many infections have no symptoms; you can compare testing providers to find one that fits.
When to see a clinician
See a clinician if you have a new abnormal discharge or odor and you're not certain what's causing it. BV, yeast, and trichomoniasis all look similar but need different treatments, so self-diagnosis often misfires. Go in sooner if you're pregnant, if symptoms keep returning, or if you also have fever, pelvic pain, or symptoms after a new partner. Recurrent episodes especially deserve a real conversation rather than another round of the same drugstore approach.