The purpose of this guideline is to introduce clinicians to the use of Motivational Enhancement Therapy (MET) with dually diagnosed consumers as one component of an integrated treatment program. Because substance abuse significantly interferes with the assessment, treatment, and management of psychiatric symptoms (Dixon, Haas, Weiden, Sweeney, & Frances, 1991; Mueser, et al., 1992; Ananth, Vandewater, Kamal, Brodsky, Gamal, & Miller, 1989), it is important that consumers reduce their recreational use of alcohol or drugs. Motivational enhancement refers to a style of clinical interaction designed to engage ambivalent or resistant consumers in the treatment process. Within an integrated treatment program, the job of the ME therapist is to prepare unmotivated consumers for a course of treatment by encouraging change talk, and decreasing resistance to the notion of reducing the use of alcohol or drugs. (Authors)