PROTOCOL OUTLINE: This is a study to estimate the optimal dose of oral itraconazole. Patients are treated at 1 of 3 doses of itraconazole; the starting dose for each patient is determined at entry.

Therapy is administered daily for 3-6 months. Patients with progressive disease may be treated at the next higher dose; there may be only 1 such increase. Concurrent systemic and topical antifungals are prohibited.

Patients are followed at 1, 3, 6, and 12 months.

PROTOCOL ENTRY CRITERIA:

--Disease Characteristics-- Culture-proven fungal disease, i.e.: Chronic cavitary histoplasmosis Extrapulmonary histoplasmosis, e.g., mucosal disease Blastomycosis Sporotrichosis Positive culture after last dose of any prior therapy Requires antifungal therapy with amphotericin B or ketoconazole No fungal meningitis No central nervous system disease No immediately life-threatening disease --Prior/Concurrent Therapy-- At least 1 month since therapy for same disease No more than 2 mg/kg prior amphotericin B (total dose) No more than 2 mg/kg prior ketoconazole (total dose) No concurrent immunosuppressives, including: Corticosteroids Azathioprine Cytotoxic agents --Patient Characteristics-- Hepatic: AST no greater than 3 times normal Alkaline phosphatase no greater than 3 times normal Bilirubin no greater than 3 mg/dL Other: No acquired immunodeficiency syndrome No pregnant or nursing women Effective contraception required of fertile women