Candidiasis is treated with antifungal medications, and the specific type depends on where the infection is and how severe it is. Most cases involve the mouth, vagina, skin folds, or esophagus and clear up within one to two weeks with the right antifungal. Invasive infections that reach the bloodstream require stronger medications given through an IV in a hospital setting.
Oral Thrush
Oral candidiasis, commonly called thrush, causes white patches on the tongue, inner cheeks, and roof of the mouth. The preferred treatment is fluconazole taken by mouth, typically 100 to 150 mg daily for 7 to 14 days. Most people notice improvement within a few days, though finishing the full course is important to prevent the infection from returning.
If fluconazole isn’t an option, topical alternatives work well for mild cases. Nystatin suspension (a liquid you swish around your mouth and swallow) and clotrimazole lozenges that dissolve slowly in the mouth both target the fungus directly on the affected tissue. These are often the first choice for children with mild thrush. If symptoms don’t respond after 14 days, a higher dose or a different antifungal may be needed, since some Candida strains have developed resistance to fluconazole.
When thrush causes difficulty swallowing, the infection may have spread to the esophagus. Esophageal candidiasis requires a longer treatment course of 14 to 30 days.
Vaginal Yeast Infections
Vaginal candidiasis is one of the most common forms, and several effective options are available over the counter. Antifungal creams, ointments, and suppositories containing miconazole or terconazole are applied for 3 to 7 days and clear most uncomplicated infections. These are widely available at pharmacies without a prescription.
For those who prefer a single-dose option, a prescription for fluconazole 150 mg taken as one pill is a popular alternative. It’s convenient, but it may take two to three days before symptoms fully improve. A newer oral antifungal called ibrexafungerp (brand name Brexafemme) was approved by the FDA in 2021 specifically for vaginal yeast infections. It works through a different mechanism than older antifungals, which makes it a useful option when standard treatments haven’t worked or when resistance is a concern.
Treatment During Pregnancy
Topical antifungal creams and suppositories are generally the go-to choice during pregnancy. The FDA has flagged that high-dose, long-term fluconazole (400 to 800 mg per day) during the first trimester may be associated with birth defects. A single 150 mg dose for a vaginal yeast infection does not appear to carry the same risk based on available human data, but many providers still prefer topical treatments as the safer route.
Skin and Skin Fold Infections
Cutaneous candidiasis typically shows up in warm, moist areas: under the breasts, in the groin, between fingers, or in belly folds. The skin becomes red, itchy, and sometimes develops small satellite lesions around the edges. Topical antifungal creams applied once or twice daily for 7 to 14 days usually resolve the infection. Keeping the affected area clean and dry speeds recovery and helps prevent recurrence.
Invasive Candidiasis
When Candida enters the bloodstream or spreads to internal organs, treatment becomes significantly more aggressive. This type of infection, called candidemia, is a serious hospital-acquired condition that typically affects people with weakened immune systems, those with central IV lines, or patients who’ve had major surgery.
The first-line treatment is a class of IV antifungals called echinocandins. These are given daily through an IV and are effective against a broad range of Candida species, including several that resist fluconazole. Fluconazole given intravenously is an acceptable alternative for patients who aren’t critically ill and whose infection is likely caused by a susceptible strain. Treatment continues for at least two weeks after blood cultures come back negative and symptoms have resolved.
Chronic disseminated candidiasis, which affects the liver and spleen, requires an even longer course. Patients typically start with IV antifungals for several weeks, then transition to oral fluconazole. Treatment continues until imaging shows the lesions have resolved, which often takes several months. Candida infections affecting the eyes require at least 4 to 6 weeks of treatment, while infections in the central nervous system are treated until all symptoms and imaging abnormalities have fully cleared.
Why Resistance Matters
Not all Candida species respond equally to fluconazole, and this has real implications for treatment choices. Candida albicans, the most common species, is generally susceptible. But other species are increasingly showing up in infections, and their resistance profiles vary widely. Candida krusei is intrinsically resistant to fluconazole, with a resistance rate around 78%. Candida glabrata resists fluconazole about 16% of the time, and Candida tropicalis shows resistance in roughly 13% of cases.
This is one reason echinocandins are now recommended as the first-line treatment for invasive infections, particularly when the specific Candida species hasn’t been identified yet or when glabrata or krusei are suspected. For mucosal infections that don’t respond to fluconazole within the expected timeframe, the infection may involve a resistant strain, and switching to a different class of antifungal is typically the next step.
Do Probiotics Help?
Probiotics have generated interest as a complementary approach, particularly for oral candidiasis. Certain strains, including Lactobacillus reuteri and Saccharomyces boulardii, show antifungal potential by competing with Candida for space on mucosal surfaces and supporting local immune defenses. One clinical trial found that combining the probiotic Streptococcus salivarius K12 with standard antifungal treatment significantly reduced the duration of oral candidiasis.
That said, the evidence is still mixed. A trial testing Lactobacillus acidophilus and Lactobacillus rhamnosus in healthy denture wearers showed unclear preventive effects. Most studies have used different strains, doses, and treatment durations, making it hard to draw firm conclusions. Probiotics are not a replacement for antifungal treatment, but they may offer modest benefits as an add-on, particularly for people prone to recurrent infections.
What Recovery Looks Like
For uncomplicated oral or vaginal infections, most people feel noticeably better within 2 to 3 days of starting treatment, with full resolution by the end of a 7- to 14-day course. Skin infections follow a similar timeline. The key is completing the full treatment even after symptoms improve, since stopping early increases the risk of the infection bouncing back.
Invasive infections have a much longer recovery arc. Candidemia requires a minimum of two weeks of IV therapy after the bloodstream is confirmed clear. Organ involvement extends that to months. These patients are closely monitored with repeat blood cultures and imaging to confirm the infection has truly resolved before antifungals are stopped, since premature discontinuation frequently leads to relapse.