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Treatments and drugs
By Mayo Clinic staffTreatment usually isn't necessary if you have a mild case of acute histoplasmosis. But if your symptoms are severe or you have the chronic or disseminated forms of the disease, you'll likely need treatment with one or more antifungal medications — most often amphotericin B (Fungizone IV) and itraconazole (Sporanox). The specific drug and the length of treatment depend on the type and severity of your illness as well as on your overall health.
In general, one of several formulations of amphotericin B is the initial treatment of choice for people with disseminated histoplasmosis or severe disease. But because these drugs can be toxic to the kidneys and must be administered intravenously, doctors usually switch to itraconazole within a few days to a few weeks, depending on how your condition improves. Corticosteroids are also sometimes given initially if you have severe respiratory disease and difficulty maintaining oxygen levels in your bloodstream.
Itraconazole alone may be effective in mild cases of disseminated histoplasmosis as well as in chronic pulmonary disease. Although itraconazole doesn't work as quickly as amphotericin B, it has fewer side effects and can be taken in pill form. While using this medication, you may experience headache, dizziness, nausea, vomiting or diarrhea, but these symptoms often go away over time. If you have a history of liver or kidney problems, or another lung disease, you'll need to be monitored closely during treatment.
If you're not a candidate for itraconazole or can't tolerate the medication, your doctor may prescribe fluconazole (Diflucan), another antifungal drug. Fluconazole isn't as effective as itraconazole, however, and you're more likely to experience a relapse with this medication.
