Bacterial vaginosis (BV) is treatable with prescription antibiotics, and most cases clear up within a week. The bigger challenge is keeping it from coming back: up to 66% of women experience a recurrence within a year of their first treatment. That high return rate means effective BV management often involves more than a single round of medication. Here’s what actually works, what might help, and what to skip.
Prescription Antibiotics: The First Step
Antibiotics are the most reliable way to clear BV. The two main options are metronidazole and clindamycin, available as oral pills or vaginal gels and creams. A typical course runs five to seven days. Most women notice the fishy odor and discharge improving within a few days of starting treatment.
Both medications work well for an initial episode, but the choice between oral and vaginal forms often comes down to side effects and convenience. Oral metronidazole can cause nausea and a metallic taste, and you need to avoid alcohol during treatment and for a day or two afterward. The vaginal gel version avoids those stomach-related side effects but requires nightly application. Clindamycin cream is another vaginal option that works similarly well. Your provider can help you pick based on your preferences and history.
Why BV Keeps Coming Back
BV isn’t a simple infection caused by one germ. It’s a shift in the entire bacterial community of the vagina, where protective bacteria (mainly Lactobacillus species) get crowded out by a mix of other organisms. Antibiotics knock back those unwanted bacteria, but they don’t necessarily restore the healthy ones. That imbalance is why recurrence rates are so high.
Sexual activity also plays a significant role. New evidence has shifted the medical consensus here considerably. The American College of Obstetricians and Gynecologists (ACOG) now recommends, for the first time, considering treatment of male sexual partners when a woman has recurrent BV. Previously, partner treatment wasn’t thought to help. The updated guidance calls for a combination of oral and topical antimicrobials for male partners, based on data showing that BV-associated bacteria can persist in the genital tract of male partners and get passed back during sex. Research is still limited for same-sex partners and people in nonmonogamous relationships.
Managing Recurrent BV
If BV keeps returning, your provider may recommend a longer, multi-step approach. CDC guidelines outline a protocol for women with multiple recurrences: a full week of oral antibiotics, followed by vaginal boric acid suppositories (600 mg daily) for 21 days, then a maintenance course of metronidazole vaginal gel twice a week for four to six months. This layered strategy addresses the initial overgrowth, helps restore vaginal acidity, and then suppresses regrowth over time.
Boric acid suppositories deserve a closer look because they’ve become widely available over the counter and get a lot of attention online. They work by lowering vaginal pH, creating an environment that favors healthy bacteria. In clinical guidelines, boric acid is used as one piece of a multi-step recurrence protocol, not as a standalone cure. It should only be used vaginally, never taken by mouth, as it is toxic if swallowed. It’s also not safe during pregnancy.
Probiotics for BV
The idea behind probiotic treatment is straightforward: if BV happens because protective bacteria disappear, reintroducing them should help. The most-studied strain for this purpose is Lactobacillus crispatus, delivered vaginally rather than taken as an oral pill. A major clinical trial tested a vaginal probiotic called LACTIN-V, applied daily for five days after standard antibiotic treatment and then twice weekly for ten weeks. The goal was to see whether colonizing the vagina with healthy bacteria after antibiotics could prevent BV from returning.
Results from this line of research have been promising enough to attract serious clinical interest, but vaginal probiotics aren’t yet a standard part of treatment guidelines. The oral probiotic capsules you find at the drugstore are a different story. Evidence that swallowing a Lactobacillus pill meaningfully changes vaginal flora is weak. If you want to try probiotics, vaginal formulations have more scientific support than oral ones, though availability varies.
Over-the-Counter pH Products
Lactic acid gels and vaginal pH-balancing products are marketed as BV treatments, but the evidence is mixed at best. A systematic review of clinical trials found that lactic acid products are generally inferior to metronidazole. In one trial, 88% of women were cured with metronidazole at the follow-up visit compared to just 23% with a lactic acid gel. Another study found lactic acid performed no better than a placebo, with cure rates of 49% and 47% respectively.
One small study did find lactic acid comparable to metronidazole, but it was an outlier. The overall picture is that these products might offer mild symptom relief or be useful as a maintenance tool for some women, but they are not a substitute for antibiotics when you have active BV. If you’re drawn to them, they’re more reasonable as something to use between episodes rather than as a primary treatment.
Habits That Lower Your Risk
Several everyday habits influence whether BV develops or returns. The most important ones involve what you put in or near the vagina:
- Skip douching entirely. Douching disrupts the vaginal bacterial balance and raises infection risk. The vagina is self-cleaning and doesn’t need internal rinsing.
- Avoid scented products. Scented soaps, body washes, sprays, and even scented tampons or pads can irritate vaginal tissue and shift pH. Wash the external genital area with warm water only.
- Use condoms. Latex condoms and dental dams reduce exposure to bacteria that can trigger BV. Semen itself is alkaline and temporarily raises vaginal pH after unprotected sex.
- Clean sex toys. Shared or improperly cleaned toys can transfer BV-associated bacteria.
These steps won’t guarantee you never get BV, especially if you’re prone to recurrence. But they remove some of the most common triggers and give your vaginal flora a better chance of staying balanced. If you’ve been dealing with repeated episodes, combining these habits with the medical strategies above, particularly the partner treatment conversation, gives you the strongest shot at breaking the cycle.