Itraconazole, or itraconazole capsules, needs to be discontinued for 21 days because the established effect has been achieved 2-4 weeks after discontinuation of the drug, and the specific discontinuation of the drug is subject to medical advice. Itraconazole capsules need to stop 21 days because the drug from the skin tissue clearance is slower than plasma, so, for patients with skin infections, the drug is generally required to stop after 2-4 weeks to achieve optimal clinical efficacy. Itraconazole capsules are mainly used for the treatment of vulvovaginal candidiasis, lichen planus, oral candidiasis and other diseases, some patients may experience nausea, headache, menstrual disorders and other adverse reactions. Pregnant women should not be used to avoid affecting fetal development. Drug allergy is prohibited to avoid symptoms such as urticaria and skin itching. Patients should use itraconazole capsules under the guidance of a doctor to avoid blind use of the drug. If symptoms of discomfort occur after using the drug, you should seek medical attention.