Lien L, et al. - Researchers conducted this observational follow-up study to examine the prevalence of smoking among patients in treatment for substance use disorders and to investigate the impact of smoking both at baseline and follow-up on drop-out, mental health and quality of life. At three separate rehabilitation clinics in Eastern Norway, 128 inpatients (26% female), mostly with alcohol use disorder, were interviewed at admission, and at 6 weeks and 6 months follow-up. The interview covered mental health issues, trauma, questions about alcohol and other substances, and overall quality of life. Data reported that 75% were daily smokers at admission. Among patients in primary alcohol use disorder treatment, smoking was associated with mental distress, poor quality of life, and treatment drop-out. The findings suggest that, in order to avoid drop-out, smoking cessation should be prescribed as an integral part of alcohol use treatment both before and during inpatient treatment.