IGHE and allergic bronchopulmonary aspergillosis: A retrospective study of 32 CF patients with ABPA treated with itraconazole, voriconazole, and posaconazole showed a significant reduction in Aspergillus IgE with posaconazole in comparison to corticosteroids only or other azoles,94 with Aspergillus IgE levels inversely correlated to drug levels.