A 10 to 14-day course of antifungal medication is used to treat thrush of the mouth, according to WebMD. Available in tablet, lozenge or liquid form, antifungal medication is effective in curing most cases of thrush in healthy adults and children, but those people with weakened immune systems typically have more severe symptoms and a more difficult time getting rid of thrush.
Because thrush is caused by an overgrowth of candida fungus, which can be a symptom of other underlying medical issues, it is often necessary to address these issues to experience a full recovery, according to WebMD. In many cases, dietary changes that include limiting the consumption of sugar and yeast-containing foods such as beer, wine and bread, also are necessary. Additional factors that prevent the spread and recurrence of thrush include practicing good oral hygiene by brushing and flossing twice per day, avoiding mouthwashes and sprays, visiting the dentist regularly and quitting smoking. Thrush is not limited to the mouth, as the same fungus also creates diaper rash in infants and vaginal yeast infections in women. Stress, medication and illness can affect the balance of microorganisms and bacteria in the body, causing the candida fungus to grow exponentially and develop into thrush.