Interactive Voice Response (IVR) for Methadone Patients

Participants will complete a baseline interview and a follow-up interview at 5-weeks post-baseline. Two-thirds of the participants will be randomized into the telephone call-in group, and will be asked to complete daily, 10-minute, telephone interviews. To complete these interviews, participants will call into a toll-free telephone interview system with a unique and private Study ID number, and answers questions by using the telephone key pad. Questions during both the face-to-face interviews and the telephone interviews will assess mood, sleep, treatment utilization and drug-related experiences. Participants will be compensated for their time. Comparison(s): Participants randomized into the telephone component of the study as compared to participants in the interview-only component of the study.