There are factors contributing to changes in patient health and the expansion of drug coverage. One of the studies conducted involved patients who had been diagnosed with HIV. In the study of outcomes among HIV-positive patients, the observed improvements in health were a direct result of the life-saving antiretroviral treatment made available to patients through their prescription drug benefits. Clearly, by reducing financial pressure on patients, prescription drug insurance helps protect them against cost-related non-compliance with medications and helps improve their health outcomes..