- HIV-associated symptoms may preclude accurate assessment of toxicity or response to the treatment and because the primary endpoint of this Phase I trial is toxicity, patients with HIV disease will be ineligible for participation. HIV-positive patients on combination antiretroviral therapy are ineligible because of the potential for pharmacokinetic interactions with AR-67. In addition, these patients are at increased risk of lethal infections when treated with marrow-suppressive therapy and are ineligible for enrollment on this study.