Lipid disorders associated with HIV infection and antiretroviral therapy are of growing concern. There is little information available on the safety and efficacy of statins or fibrates in the treatment of HIV-associated hyperlipidemias. Fenofibrate and pravastatin both are able to reduce low-density lipoproteins (LDL) and triglycerides (TG), but it is unclear whether one therapy will be more effective than the other, or if combination therapy will be needed to achieve desirable reductions in both LDL and TG. [AS PER AMENDMENT 12/13/01: The NIAID HIV Therapeutic Trials Data and Safety Monitoring Board (DSMB) met June 26, 2001 to review the interim results. The interim monitoring plan for this study states that accrual into either single-agent therapy arm should stop if the response rate failed to meet a pre-specified minimum at the time of interim review. The DSMB found that this stopping criterion was met for each single-therapy arm. The DSMB recommended that patients currently on single-agent therapy be offered the opportunity to initiate dual-agent therapy, regardless of time on study. There were no safety concerns.]