Substance use research focuses on the patterns, causes, consequences, and interventions related to the consumption of drugs and alcohol. Researchers in this area examine the prevalence of substance use, risk factors for initiation and escalation of use, the impact of substance use on physical and mental health, social and economic consequences of substance abuse, and interventions to prevent and treat substance use disorders. This research is critical for informing public health strategies, policy development, and treatment approaches to address substance use issues in society.