Adherence to antiretroviral (AR) therapy has become increasingly important in the management of HIV infection. Adherence to AR regimens is thought to be a critical factor in maintaining therapeutic drug levels, thus helping ensure viral suppression and minimizing the risk of drug resistance. However, AR regimens are often complex with demanding dosing schedules. Patients often miss doses because they simply forget; other factors such as substance abuse, depression, and low literacy levels also contribute to nonadherence. Adherence is influenced not only by individual behavior but also by the services, the quality of the patient-provider relationship, and the amount of social support offered the patient. There is no currently agreed upon, widely used, and generalizable intervention for improving adherence over the long course of HIV therapy. This study provides a long-term comparative evaluation of two interventions.