 In a randomized controlled trial, patients recruited in a general hospital and fulfilling criteria for alcohol dependence, alcohol abuse or at-risk drinking will be randomly allocated to two conditions:1 Transtheoretical Model TTM-based expert system group, patients receive an individualized feedback on drinking norms, health-related risks and core constructs of the TTM, augmented by a TTM-based manual, 2 Control group,receiving a booklet on health behavior. 