Bacterial vaginosis (BV) is treated with prescription antibiotics, most commonly metronidazole or clindamycin. There is no effective over-the-counter cure for BV, so you’ll need to see a healthcare provider to get the right treatment. The good news is that a standard course of antibiotics clears most cases within about a week.
First-Line Antibiotic Options
The two main antibiotics used for BV are metronidazole and clindamycin, and both come in oral (pill) and vaginal forms. The most common regimen is metronidazole taken by mouth twice a day for seven days. If you’d rather avoid pills, a metronidazole vaginal gel applied once daily for five days works similarly. Clindamycin vaginal cream, used at bedtime for seven days, is the other standard option.
Your provider will help you choose between oral and vaginal treatment based on your preferences and health history. Oral metronidazole is convenient but comes with a notable restriction: you cannot drink alcohol while taking it and for two full days after finishing the course. Mixing the two causes intense nausea, vomiting, and flushing. If skipping alcohol for nine or ten days isn’t realistic for you, a vaginal treatment may be a better fit.
One important note about clindamycin cream: it contains mineral oil that weakens latex and rubber. If you use condoms or a diaphragm, they won’t be reliable during treatment and for five days after your last dose. Plan accordingly.
How to Tell It’s BV and Not a Yeast Infection
Many people assume vaginal symptoms mean a yeast infection and reach for an over-the-counter antifungal. But BV and yeast infections look and feel different, and using the wrong treatment wastes time while the actual problem persists.
BV typically produces a thin, grayish discharge that’s heavier than usual, along with a noticeable fishy odor that often gets stronger after your period or after sex. Yeast infections, by contrast, cause a thick, white, cottage cheese-like discharge with intense itching but usually no strong odor. If you’re noticing smell more than itch, BV is the more likely culprit. A provider can confirm the diagnosis with a quick swab.
Why BV Keeps Coming Back
Recurrence is one of the most frustrating things about BV. More than half of people treated for BV experience another episode within a year. The vagina naturally maintains an acidic environment dominated by beneficial bacteria, and BV happens when that balance shifts toward other organisms. Semen and menstrual blood both have a higher pH than the vagina, which is one reason flare-ups often follow periods or unprotected sex.
For people dealing with multiple recurrences, the CDC outlines a longer, multi-step approach: a full seven-day course of oral antibiotics, followed by intravaginal boric acid suppositories (600 mg daily) for 21 days, then a maintenance phase of metronidazole vaginal gel used twice a week for four to six months. This extended protocol aims to fully reset the vaginal environment and keep BV from bouncing back. It requires a prescription and close follow-up with your provider.
Boric Acid Suppositories
You may have seen boric acid suppositories sold over the counter and marketed for vaginal health. Boric acid helps restore vaginal acidity, and it does have a role in BV treatment, but primarily as part of the multi-step recurrence protocol described above, not as a standalone first-line cure. Using boric acid on its own without antibiotics is unlikely to fully clear an active BV infection. If you want to try it, talk to your provider about where it fits into your treatment plan. Boric acid is toxic if swallowed, so suppositories should only ever be used vaginally and kept away from children and pets.
What About Probiotics?
The idea behind probiotics for BV makes intuitive sense: if BV is a shortage of beneficial bacteria, why not add them back? Two specific strains, Lactobacillus rhamnosus GR-1 and Lactobacillus reuteri RC-14, have been the most studied for vaginal health. However, a randomized controlled trial testing these strains as an add-on to standard antibiotic treatment found that adding the probiotic (at a billion colony-forming units per day for 30 days) did not increase the cure rate compared to antibiotics alone.
That doesn’t mean probiotics are worthless for vaginal health in general, but the current evidence doesn’t support them as a reliable BV treatment. They won’t replace antibiotics for an active infection.
Home Remedies to Avoid
Hydrogen peroxide douching is one of the most commonly suggested home remedies for BV, and it’s one you should skip. A randomized trial comparing a single hydrogen peroxide douche to a single dose of oral metronidazole found a cure rate of only 62.5% for hydrogen peroxide versus 78.6% for the antibiotic. Beyond being less effective, hydrogen peroxide can cause severe vaginal irritation and damage to the vaginal lining due to its caustic properties.
Douching of any kind, whether with hydrogen peroxide, vinegar, or commercial products, disrupts the vaginal microbiome and generally makes BV worse or more likely to recur. The vagina is self-cleaning, and introducing fluids under pressure pushes bacteria further into the reproductive tract.
BV During Pregnancy
BV during pregnancy is associated with a higher risk of preterm birth and low birth weight, so it’s typically treated rather than left alone. Oral metronidazole is considered safe during pregnancy. If you’re pregnant and notice the characteristic thin, fishy-smelling discharge, bring it up at your next prenatal visit or call your provider sooner. Treatment is straightforward, and the standard antibiotic courses apply.
What to Expect During Treatment
Most people notice improvement within two to three days of starting antibiotics, but it’s important to finish the entire course even if symptoms disappear early. Stopping early increases the chance of the infection returning. During treatment with vaginal gels or creams, you may notice some mild irritation or increased discharge as the medication works. Oral metronidazole can cause a metallic taste in the mouth, mild nausea, or stomach upset in some people.
You don’t necessarily need a follow-up visit if your symptoms resolve completely. But if symptoms return within a few weeks or never fully go away, go back. Persistent or recurrent BV may need the longer multi-step treatment approach, and your provider may want to rule out other infections that can mimic BV symptoms.