Participation in this study will last 1 year, including follow-up visits. All participants will complete an initial one-visit intervention addressing treatment adherence. Then after 2 weeks, participants will be randomly assigned to one of three conditions: CBT for HIV medication adherence and depression (CBT-AD), information and supportive psychotherapy for HIV medication adherence and depression (ISP-AD), or enhanced treatment as usual (ETAU). Participants receiving CBT-AD and ISP-AD will complete 12 therapy sessions over 4 months and will be asked to report any changes to their psychological or HIV treatments. CBT-AD will involve learning to identify and change problematic patterns of thought and behavior, while ISP-AD will involve education and supportive psychotherapy. Participants receiving ETAU will receive only the initial session on HIV medication adherence and will be asked about their psychological and HIV treatment every other week for 4 months.