- HIV-positive patients on combination antiretroviral therapy are ineligible because of the potential for pharmacokinetic interactions with Triapine®; in addition, these patients are at increased risk of lethal infections when treated with marrow-suppressive therapy; appropriate studies will be undertaken in patients receiving combination antiretroviral therapy when indicated; HIV testing is not mandatory; patients that are known to be HIV-positive are ineligible if they are receiving combination antiretroviral therapy