Eight sessions of Motivational Interviewing and Cognitive Behavioral Skills Training, adapted to target both MA use and medication adherence, as well as sexual risk behaviors and polydrug use.

Eight sessions of education with content designed to mirror the information covered in the intervention condition. The content will be as follows: 3 sessions focusing on medication adherence; 3 sessions focusing on the dangers of methamphetamine use; 1 session addressing sexual risk; and 1 session addressing poly-substance use.

The first two sessions will be primarily Motivational Interviewing and begin with an introduction to the nature of treatment, emphasizing the client's autonomy, and explain that the purpose of the sessions is to explore feelings about their medication adherence, meth use, and any other issues, with the eventual goal of working towards any changes the client may wish to make. During the third session, the client will complete an individualized functional analysis of recent occasions when the client missed medication, used MA and/or other substances, and engaged in risky sex (not necessarily all at the same time). Sessions four through seven will focus on Cognitive Behavioral Skills Training for adherence, reducing or stopping meth use, reducing or stopping the combination of meth and other drug use, and avoiding risky sexual behavior. The final session emphasizes maintenance of behavior change and relapse prevention.

Participants in the intervention condition will report greater reductions in viral load, and greater increases in CD4 counts and self-reported adherence than those in the education comparison at at the end of the intervention period (3 months). Those in the intervention condition will also maintain greater reductions in viral load, and greater increases in CD4 counts and self-reported adherence than those in the education comparison condition at the three follow-up assessments (6, 9, and 12 months).

Participants in the intervention condition will report greater reductions in self-reported days of methamphetamine use than those in the education comparison at at the end of the intervention period (3 months). Those in the intervention condition will also maintain greater reductions in self-reported days of methamphetamine use than those in the education comparison condition at the three follow-up assessments (6, 9, and 12 months).

Participants in the intervention condition will report greater reductions in high-risk sexual behavior compared to participants in the educational comparison condition.