Antifungal medications kill yeast infections by destroying the cell membranes of Candida, the fungus responsible for the infection. Most cases clear up within a few days of starting treatment, though more severe infections can take longer. You have several effective options, from drugstore creams to a single prescription pill, depending on how severe or frequent your infections are.
How Antifungal Medications Work
The fungus that causes yeast infections, Candida, relies on a specific fatty substance in its cell walls to survive. Antifungal medications block the enzyme that produces this substance, weakening the cell walls until the fungus can no longer hold itself together. Without intact cell membranes, the yeast stops growing and dies off. This is why most antifungal treatments, whether applied as a cream or taken as a pill, belong to the same drug family and work through this shared mechanism.
Over-the-Counter Treatments
The most accessible way to kill a yeast infection is with an OTC antifungal cream or suppository. These products come in 1-day, 3-day, and 7-day formulations, and they’re all effective. In a clinical trial comparing a single-dose ointment against a 3-day vaginal tablet, 90% and 88% of patients respectively remained symptom-free at the four-week follow-up. The shorter treatments use a higher concentration of medication per dose, while the longer courses spread a lower concentration over more days.
Common OTC options include miconazole (sold as Monistat) and clotrimazole. Tioconazole is the active ingredient in most single-dose products. All are inserted vaginally at bedtime and often come with an external cream for itching around the vulva. The 7-day version tends to cause less local irritation because the concentration per dose is lower, which can matter if your skin is already raw from scratching.
Prescription Options
A single 150-mg oral fluconazole tablet is the standard prescription treatment. You swallow one pill and the medication works systemically through your bloodstream. Many people prefer this over creams because there’s no mess, no nightly routine, and no waiting for a suppository to dissolve. For more complicated infections, your provider may prescribe a second dose 72 hours after the first.
Prescription-strength vaginal creams also exist for infections that don’t respond to OTC products. Terconazole, for example, is used daily at bedtime for either 3 or 7 days. Your provider might choose a prescription cream when a standard OTC treatment hasn’t worked or when the infection involves a less common strain of Candida that’s harder to kill with first-line products.
What to Expect During Treatment
Most yeast infections clear up within a few days of starting medication, but a full week isn’t unusual. Itching and burning typically begin to ease within the first day or two, though some residual irritation can linger even after the fungus is gone. If your symptoms haven’t improved after finishing a complete course of treatment, the infection may involve a resistant strain or may not have been a yeast infection in the first place.
While you’re treating the infection, avoid scented soaps, douches, and tight synthetic underwear, all of which can slow healing. Cotton underwear and loose clothing help keep the area dry, which discourages yeast from regrowing.
Recurrent Infections
About 5% of women experience recurrent yeast infections, defined by the CDC as three or more symptomatic episodes in less than a year. At that point, killing each individual infection isn’t enough. The standard approach is a long-term maintenance regimen: oral fluconazole taken once weekly for six months. This keeps fungal populations suppressed low enough that they can’t flare into a full infection.
If you’re dealing with recurring infections, it’s worth getting a culture done rather than self-treating. Some Candida species are naturally resistant to the most common antifungals, and a culture identifies exactly which strain you’re dealing with so your provider can match it to the right medication.
Probiotics and Vaginal Balance
Healthy vaginal flora is dominated by Lactobacillus bacteria, which create an acidic environment that keeps Candida in check. When that bacterial population drops, whether from antibiotics, hormonal shifts, or other factors, yeast can overgrow. Probiotic strains originally isolated from the female urogenital tract, specifically L. rhamnosus GR-1 and L. fermentum RC-14, have been shown to recolonize the vagina and significantly deplete yeast when taken orally. In a randomized trial of 64 women, those taking these strains had measurably higher vaginal Lactobacillus levels and lower yeast counts within 28 days compared to controls.
Probiotics won’t kill an active infection on their own, but they can help restore the microbial environment that prevents the next one. Look for supplements that specifically list these strains rather than generic probiotic blends marketed for digestive health.
Does Sugar Feed Yeast Infections?
There’s a real biological link between sugar and yeast. Candida thrives on glucose, and high blood sugar creates a more hospitable environment for fungal growth. Diets high in sugar can disrupt the balance of vaginal bacteria, killing off protective Lactobacillus species and allowing yeast to take over. This is one reason people with poorly controlled diabetes are significantly more prone to yeast infections.
Cutting sugar won’t cure an active infection the way an antifungal will, but reducing your intake of refined sugars and simple carbohydrates can lower your risk of future episodes, particularly if you’re someone who gets them repeatedly. The effect is indirect: steadier blood sugar supports a healthier bacterial balance, which in turn keeps Candida populations from growing out of control.