Itraconazole 200 mg capsules are a prescription antifungal medication used to treat a wide range of fungal infections affecting the lungs, skin, nails, mouth, and other parts of the body. It works by stopping the growth of fungi and damaging their cell membranes, helping to eliminate the infection effectively. Itraconazole capsules are usually taken with food to improve absorption, and the dosage and duration depend on the severity of the infection.