Antibiotics are not used to treat yeast infections, and in fact, taking antibiotics is one of the most common causes of yeast infections. Yeast infections are caused by a fungus, not bacteria, so they require antifungal medications instead. The most widely used treatment is fluconazole, a single pill taken by mouth, or an over-the-counter antifungal cream like miconazole applied vaginally for three to seven days.
Why Antibiotics Don’t Work on Yeast Infections
Antibiotics kill bacteria. Yeast infections are caused by an overgrowth of a fungus called Candida, which has a completely different cell structure that antibiotics can’t target. Using an antibiotic for a yeast infection would do nothing to clear it and could actually make it worse.
Here’s the irony: antibiotics are one of the leading triggers for yeast infections in the first place. Your vagina naturally contains a type of bacteria called Lactobacillus that keeps the environment slightly acidic. That acidity holds yeast growth in check. When you take antibiotics for a sinus infection, UTI, or anything else, those drugs don’t distinguish between harmful bacteria and helpful Lactobacillus. Without enough Lactobacillus, your vagina becomes less acidic, and Candida can multiply unchecked.
Antifungal Medications for Yeast Infections
The medications that actually treat yeast infections fall into two main categories: oral antifungals you swallow as a pill, and topical antifungals you apply directly in the vagina as a cream, ointment, or suppository.
For a straightforward, uncomplicated yeast infection, the options include:
- Fluconazole (Diflucan): A single 150 mg pill taken by mouth. This is the most commonly prescribed option because of its convenience. It requires a prescription.
- Miconazole (Monistat): An over-the-counter cream or suppository used vaginally for three to seven days. Available without a prescription at most pharmacies.
- Terconazole: A prescription vaginal cream or suppository, typically used for three to seven days.
For most people, a single dose of fluconazole or a short course of vaginal cream clears the infection completely. The OTC creams and the prescription pill are similarly effective, so the choice often comes down to preference. Some people like the simplicity of swallowing one pill. Others prefer a topical treatment that starts working at the site of infection right away.
Newer Prescription Options
The FDA has approved two newer antifungal medications for vaginal yeast infections. Oteseconazole (Vivjoa) is an oral pill designed specifically for people who get recurrent yeast infections. Ibrexafungerp (Brexafemme) works through a different mechanism than the older antifungals, which makes it a useful option when standard treatments aren’t effective. Both require a prescription and are generally reserved for cases where first-line treatments fall short.
Treatment for Recurrent Yeast Infections
About 5% of women experience recurrent yeast infections, defined as three or more episodes in a single year. These cases need a different approach than a one-time infection.
The typical strategy starts with a longer initial treatment to fully clear the yeast, either 7 to 14 days of topical antifungal therapy or three oral doses of fluconazole spread over a week (on days 1, 4, and 7). Once the active infection is under control, maintenance therapy begins: a weekly oral dose of fluconazole for six months. This extended regimen helps prevent the yeast from bouncing back. If oral medication isn’t an option, intermittent topical treatments can serve as an alternative.
How to Tell It’s Actually a Yeast Infection
Getting the right treatment starts with knowing what you’re actually dealing with. Yeast infections, bacterial vaginosis (BV), and trichomoniasis can all cause vaginal discomfort, but they require completely different medications. BV is treated with antibiotics, while yeast infections require antifungals. Using the wrong one won’t help and can delay relief.
The discharge patterns are a useful clue. Yeast infections typically produce thick, white, odorless discharge, sometimes with a cottage cheese-like texture, along with itching and irritation. BV tends to cause grayish, foamy discharge with a noticeable fishy smell. Trichomoniasis, a sexually transmitted infection, often produces frothy, yellow-green discharge that smells bad and may have spots of blood.
If you’ve had a yeast infection before and recognize the symptoms clearly, OTC antifungal treatment is reasonable. But if this is your first time experiencing these symptoms, if your symptoms don’t improve within a few days of treatment, or if infections keep coming back, getting an accurate diagnosis matters. What feels like a stubborn yeast infection could be BV or another condition entirely, and no amount of antifungal cream will fix a bacterial problem.