<p>Adolescence is a crucial period of life for the prevention of substance use disorders. Research has shown that early intervention can significantly reduce rates of substance use disorder in adulthood. To learn more about effective family-focused interventions in primary care settings for preventing substance use disorder, the National Academies of Sciences, Engineering, and Medicine hosted a workshop on May 5-6, 2022. The proceedings from that workshop explores existing efforts to incorporate family-focused interventions into state health care policies. It also examines barriers to implementing such interventions as well as lessons learned from successful efforts to scale up these interventions.</p>