Thrush is treated with antifungal medications, either applied directly inside the mouth or taken as a pill. Most mild cases clear up within one to two weeks with topical treatment alone. More stubborn or widespread infections require oral antifungal tablets, and treatment can extend to four weeks or longer in people with weakened immune systems.
Topical Treatments for Mild Cases
For a straightforward case of oral thrush, the first step is usually a topical antifungal that works right where the infection lives. The two most commonly used options are nystatin oral suspension and miconazole oral gel. Nystatin comes as a liquid you swish around your mouth and then swallow (or spit out, depending on your provider’s instructions). The typical dose for adults is about one teaspoon, four times a day. You hold it in your mouth for as long as you can before swallowing so it stays in contact with the affected tissue.
Miconazole is available in several forms, including an oral gel, a buccal tablet that sticks to your gum, and even a chewing gum formulation in some countries. These are applied directly to the white patches and surrounding tissue. Clotrimazole lozenges are another option: you dissolve a 10-milligram lozenge in your mouth five times a day for at least 14 days. Each lozenge takes 15 to 30 minutes to dissolve completely, and you shouldn’t chew or swallow it whole.
With any topical treatment, the key is contact time. The medication needs to sit against the infected tissue long enough to kill the yeast. Eating or drinking right after applying it reduces effectiveness, so try to wait at least 30 minutes.
When You Need Oral Medication
If topical treatment doesn’t resolve the infection, or if thrush is more severe from the start, the standard next step is fluconazole taken by mouth. A typical course starts with a 200-milligram dose on the first day, followed by 100 milligrams once daily until symptoms resolve. Most people take it for 7 to 14 days, though the duration depends on how quickly the infection responds.
Fluconazole is particularly common for people with weakened immune systems, such as those undergoing chemotherapy, living with HIV, or taking medications that suppress the immune response. For these patients, thrush tends to be more persistent and more likely to spread, so starting with a systemic medication rather than a topical one makes sense.
Treating Stubborn or Recurring Infections
Some thrush infections don’t respond to fluconazole. This is called refractory disease, and it’s becoming more of a concern as certain Candida strains develop resistance to common antifungals. When fluconazole fails, providers typically move to itraconazole oral solution, taken once daily for up to four weeks. Another option is posaconazole, a similar antifungal with a broader spectrum of activity. Voriconazole is a third alternative, originally developed from fluconazole but effective against a wider range of resistant strains.
One complication with itraconazole is that the body doesn’t always absorb it reliably, and it interacts with a longer list of other medications compared to fluconazole. If you’re on multiple prescriptions, your provider will need to check for conflicts. For the most severe cases, particularly in hospitalized patients, intravenous antifungals like echinocandins may be necessary, though this is uncommon for thrush that hasn’t spread beyond the mouth.
What You Can Do at Home
Saltwater rinses are a simple supportive measure during treatment. Dissolve about half a teaspoon of salt in one cup of warm water, swish it around your mouth, and spit it out. This won’t cure thrush on its own, but it helps soothe irritated tissue and creates a less hospitable environment for yeast. Don’t swallow the rinse.
You may see recommendations for a “candida diet” that eliminates sugar, white flour, yeast, and cheese. While cutting back on processed foods and refined sugar is generally healthy, no clinical trials have shown that a specific candida cleanse diet treats oral thrush. The antifungal medication is doing the heavy lifting. That said, replacing processed foods with whole, unprocessed options may help you feel better overall during recovery.
Treating Thrush in Babies and Breastfeeding Mothers
Infant thrush is common and usually treated with nystatin oral suspension, since babies can’t safely use lozenges or tablets. The liquid is applied to the inside of the baby’s mouth with a dropper or a clean finger, targeting the white patches on the tongue and cheeks.
Here’s the part many parents miss: if a breastfeeding baby has thrush, the mother often needs treatment too. The yeast passes back and forth between the baby’s mouth and the nipple, so treating only one of them leads to reinfection. Signs of nipple thrush include burning, itching, or unusual pain during feeding. Both mother and baby should be treated at the same time, and any other fungal infections in the family (diaper rash, athlete’s foot) should be addressed as well to break the cycle.
Practical steps that help during treatment include keeping nipples dry by changing breast pads frequently, boiling bottle teats and pacifiers for five minutes after each use (replacing them weekly if possible), and washing hands thoroughly after diaper changes and before breastfeeding.
Denture Wearers Need Extra Steps
Dentures are one of the most common risk factors for recurring thrush because yeast colonizes the denture surface and reinfects the mouth every time you put them in. Antifungal medication alone won’t solve the problem if the dentures themselves aren’t properly cleaned.
The most effective chemical cleanser for disinfecting dentures is a dilute sodium hypochlorite (bleach) solution, which kills yeast on the acrylic surface. Chlorhexidine gel is another option that reduces Candida colonization with minimal staining. For a low-tech approach, microwaving dentures (when they contain no metal components) has been shown to be as effective as chemical disinfection at killing yeast.
Beyond cleaning, the basics matter: remove dentures every night, since wearing them while you sleep traps moisture and warmth against the palate, which is exactly what yeast thrives in. Poorly fitting dentures that rub or create sore spots also increase infection risk, so having them adjusted or replaced when they no longer fit well is part of long-term prevention.
Signs the Infection May Be Spreading
Oral thrush that isn’t adequately treated can spread from the mouth into the esophagus. Warning signs include pain or difficulty swallowing, a sensation of food getting stuck in your throat or mid-chest area, and fever. Esophageal involvement is more common in people with significantly weakened immune systems, but it can happen to anyone whose oral thrush goes untreated or doesn’t respond to initial therapy.
If your symptoms linger or worsen despite treatment, or if thrush keeps coming back after finishing a course of antifungals, that warrants a follow-up visit. Recurring infections can signal an underlying issue with immune function or may indicate that the yeast strain involved has developed resistance to the medication you were prescribed.