 The efficacy of a new integrated treatment, the Brief Intervention for Socially Anxious Drinkers BISAD was developed and tested. All participants reported heavy alcohol use, alcohol-related problems and social anxiety based on standardized measures. Phase I of the study focused on the development of the treatment manuals and measures of therapy integrity for BISAD and an alcohol-focused intervention, a modified treatment-as-usual at the local university. During this phase therapists were trained to administer the manualized interventions to study participants N12. Phase II included further refinement of the therapy integrity measures and data collection for the pilot study N41. Participants were randomized to either BISAD n21 or a modified treatment-as-usual n20 condition. The pilot study provide preliminary data on the efficacy of the proposed intervention in reducing heavy drinking, social anxiety, and their negative consequences at 1-month and 4-month follow-ups after treatment termination. These data provide estimated effect sizes for future testing of BISAD in a full-scale clinical trial. Furthermore, the study results contribute to the conceptualization and methodological development of combined interventions for other substance use and psychiatric problems. 