IGT is being compared with 12 sessions of Group Drug Counseling (GDC) in a randomized controlled trial, with a sample size of 60 subjects. GDC is the type of treatment one would likely receive in a community drug abuse treatment program, in that it focuses primarily in substance use, unlike IGT, which focuses equally on SUD and BD issues. Patients are followed for a year after the end of the group therapy, to examine the long-term effects of the treatment, and also to examine the longer-term relationship of substance use and mood. Patients in the trial must be taking a mood stabilizer to enter the study. Any drug of abuse is accepted, and all subtypes of BD are accepted.