Itraconazole 200 mg capsules are a prescription antifungal medicine used to treat a variety of fungal infections affecting the lungs, mouth, throat, nails, and skin. It works by inhibiting the growth of fungi, helping the body clear the infection effectively. These capsules are often taken with food to improve absorption, and the dosage duration depends on the type and severity of the infection. Common side effects may include nausea, headache, dizziness, or stomach upset. Patients with liver disease or heart conditions should use it cautiously and only under medical supervision. It is important to complete the full course as prescribed to prevent recurrence or resistance.