Dronabinol Versus Placebo in Treatment and Prevention of Highly Active Anti-Retroviral Therapy (HAART)-Related Nausea and Vomiting

Inclusion Criteria: * Adherence to prior or current HAART was or is being compromised, or HAART was discontinued/interrupted due to nausea/vomiting; or beginning HAART or switching from a regimen at the time of screening for this study that did not produce significant nausea and/or vomiting to a regimen with zidovudine or a protease inhibitor (with or without low dose ritonavir). Exclusion Criteria: * Subjects with recent (within 30 days of randomization) or current opportunistic infection or neoplasm characteristic of AIDS (Category C of the CDC Classification System for HIV-1 infection, 1993 Revised Version).