Alcohol addiction is among the most frequent mental health problems in Spain, affecting more than 4% of the general population and it accounts for around 35% of admissions to outpatient services of Spanish National Health System (NHS). Alcohol addiction has significant morbidity and mortality, and several comorbidities that limit the effectiveness of psychological treatments. The scientific literature suggests that emotional dysregulation is one of the most important determinants of craving and relapse, therefore may represent a promising target for improving psychological treatments for alcohol addiction. Recently, different transdiagnostic psychological treatments have been focused on the etiological and maintenance mechanisms underlying different disorders, providing a comprehensive model to treat emotion dysregulation. From this perspective, alcohol use has been considered a maladaptive behavior to regulate aversive emotional states. DBT and UP are two examples of transdiagnostic treatments with good efficacy and effectiveness results to treat emotion dysregulation and have shown preliminary effectiveness to treat alcohol addiction. Research studies on psychological treatments have traditionally focused on the efficacy of evidence-based interventions. However, there is a major problem in translating these treatments into the clinical practice. Because research on dissemination and implementation is a relatively new area of study in the addictions field, little is known about how to optimize the implementation of evidence-based psychological treatment. One of the main barriers encountered in the implementation of psychological interventions for alcohol addiction is the inadequate training of professionals. With regard to facilitators, providers' familiarity with the interventions, perception of their effectiveness, and attitudes toward them have been found to be associated with the likelihood of success in treatment implementation.

In this study, two sequential phases are proposed. The first phase aims to evaluate the effect of the dissemination of two treatments (DBT-SUD and UP) on the attitudes, readiness to change, acceptability and intention to use these interventions in mental health professionals, as well as to explore information on the adaptation of both interventions to real contexts of public addiction settings. The participants in phase 1 will be at least 160 mental health professionals (psychiatrist, psychologist and nurse) who work in the Spanish NHS drug addiction services of Aragón, Valencia and Catalonia regions and are treating people with alcohol addiction. In this phase 1, after they provide informed consent, participants will be randomized assigned to receive online training in one intervention and then the other (DBT-SUD and UP; the content of these trainings can be consulted in the intervention section) and will complete a series of questionnaires before and after each training. In addition to the battery of questionnaires (they are described in the outcome measures section), to collect qualitative information, participants will be given the possibility to participate in small focus groups. The questions included in the focus group interviews will explore the acceptability and intention to use both interventions (DBT and UP) as well as possible adaptations that would be needed to implement them in clinical practice.

The second phase aims to evaluate variables regarding implementation (i.e. barriers, adoption, adequation, fidelity) of the interventions. The main purpose of this phase is to promote an adequate implementation of transdiagnostic interventions in the reality of addiction services of the NHS. In this phase 2 of the study, it was expected to recruit at least 20% of the professionals trained in phase 1. Participants will be randomly assigned to implement one of the interventions first, and then the other (DBT-SUD or UP). Quantitative measures will be administered before, during and after the implementation process. Professionals may voluntarily participate in small discussion groups. The following variables are proposed to be evaluated during this phase: 1) acceptability; 2) adoption and reach; 3) appropriateness; 4) feasibility; 5) fidelity; 6) barriers and facilitators of implementation. The implementation of DBT-SUD and UP interventions will be done in a group format and will last around 3 months in a weekly basis (between 12-14 sessions, two hours per session). The interventions will be adapted according to the context in which they are applied following the feedback collected by the professionals. The DBT-SUD program will consist of applying the DBT skills training. The specific contents will be based on Maffei´s team adaptations of DBT for alcohol addiction, which include emotion regulation skills, distress tolerance, mindfulness (present moment awareness) and addiction skills and has shown good results in improving the severity and frequency of alcohol consumption and emotional dysregulation with a 3-month program. The UP will consist of 8 treatment modules that include training in 5 core emotional regulation skills: mindfulness training, cognitive flexibility, identification/oppositional behavior of emotional behaviors, interoceptive exposure, and emotional exposure. The content of the intervention will be based on previous recommendations for the adequate implementation of the UP in substance use disorders. To guarantee implementation of the interventions, supervisions by the experts will be carried out session by session with the aim of evaluating treatment fidelity and help practitioners overcome barriers during the implementation process.