- interferons, interleukins (other than the study rhIL-2), sargramostim, dinitrochlorobenzene, thymosin alpha 1, thymopentin, inosiplex, polyribonucleoside, ditiocarb sodium, thalidomide, rifabutin, rifampin, midazolam, triazolam, oral ketoconazole, cisapride, terfenadine, astemizole, any investigational drug, therapy with foscarnet, systemic corticosteroids (systemic corticosteroids for <= 21 days are permitted for treatment of Pneumocystis carinii pneumonia; for other indications, contact the Protocol Chair), and other protease inhibitors. [AS PER AMENDMENT 4/5/00: St. John's wort is also excluded.]