For a straightforward yeast infection, most providers prescribe a single oral dose of fluconazole (150 mg), commonly known by the brand name Diflucan. It’s one pill, taken once, and symptoms typically start improving within one to three days. Depending on the situation, your provider might instead prescribe a topical antifungal cream or suppository, especially if you’re pregnant or dealing with a recurring infection.
The Single-Pill Option
Fluconazole is the most commonly prescribed treatment for uncomplicated vaginal yeast infections. You take one 150 mg tablet by mouth, and that’s it. The medication works by blocking a key step in how the fungus builds its cell walls. Without intact cell membranes, the yeast can’t survive or multiply.
Most people notice itching and discharge start to ease within one to three days. If a single dose doesn’t fully clear things up, or the infection is more severe, your provider may prescribe three doses taken three days apart (on days 1, 4, and 7). With that schedule, symptoms generally resolve within one to two weeks.
Prescription Creams and Suppositories
Not everyone gets the oral pill. Some providers prescribe topical antifungals that you apply directly in the vagina. Terconazole is the most common prescription-strength option, and it comes in two forms:
- Cream: One full applicator (5 grams) inserted at bedtime for either 3 or 7 consecutive nights, depending on the concentration your provider chooses.
- Suppository: One 80 mg suppository inserted at bedtime for 3 consecutive nights.
The shorter courses use a higher concentration, while the 7-day courses use a lower one. Both work the same way, just at different strengths. Topical treatments tend to be preferred during pregnancy because the medication stays local rather than circulating through the bloodstream. Oral fluconazole is generally avoided in pregnant patients.
Over-the-Counter vs. Prescription
You’ve probably seen antifungal creams like miconazole and clotrimazole at the pharmacy. These are available without a prescription in 1-day, 3-day, and 7-day courses. They work through the same basic mechanism as prescription antifungals.
The main reasons a provider might write a prescription instead of recommending an OTC product: convenience (one pill versus several nights of cream), a confirmed diagnosis that rules out other conditions that mimic yeast infections, or a situation where OTC treatments haven’t worked. If you’ve never had a yeast infection before or aren’t sure that’s what’s going on, getting an accurate diagnosis matters because bacterial vaginosis and other infections cause similar symptoms but require completely different treatment.
Treatment for Recurring Infections
A yeast infection is considered recurrent if it happens four or more times in a year. The treatment approach changes significantly at that point. Instead of a single dose, the CDC recommends a longer initial course to fully clear the fungus: either 7 to 14 days of a topical antifungal, or oral fluconazole taken every third day for three total doses.
After that initial clearing phase, you move into maintenance therapy. This means taking oral fluconazole once a week for six months. The goal is to suppress the yeast long enough for the cycle of reinfection to break. If weekly oral medication isn’t an option, intermittent topical treatments can serve as an alternative. Most recurrent infections caused by the common yeast species respond well to this protocol, though it requires patience and consistency over several months.
When the Usual Treatments Don’t Work
Sometimes a yeast infection doesn’t respond to standard antifungals. This often happens when the infection is caused by a less common yeast species rather than the typical one. These strains can be naturally resistant to the azole class of antifungals that includes fluconazole.
For resistant infections, providers may prescribe boric acid vaginal suppositories. The standard protocol is a 600 mg gelatin capsule inserted vaginally once daily for 14 days. Boric acid is not taken by mouth. It’s specifically a vaginal treatment, and it works through a different mechanism than standard antifungals, which is why it can succeed where other options fail. This is typically a second-line approach, used after azole treatments have been tried without success.
What to Expect After Treatment
With a single dose of fluconazole, you should feel noticeably better within one to three days, though mild symptoms can linger slightly longer as the tissue heals. Topical treatments often bring faster local relief since the medication is applied directly to the affected area, but you need to complete the full course even if symptoms improve early.
If your symptoms haven’t improved after the expected timeframe, or if they come back shortly after treatment ends, that’s worth a follow-up. It could mean the infection wasn’t fully cleared, the yeast strain needs a different medication, or the original diagnosis needs revisiting. Persistent vaginal itching, burning, or unusual discharge can have several causes beyond yeast, and getting the right diagnosis is the fastest path to the right treatment.