Key Takeaways

• Substance use disorder (SUD) is a chronic but treatable medical condition involving brain changes that make stopping difficult despite harmful consequences.
• Biological vulnerability, environmental stressors, early exposure, and co-occurring mental health conditions all contribute to the development of SUD.
• Symptoms include cravings, tolerance, withdrawal, and continued use despite strained relationships or declining health.
• Effective treatment often combines behavioral therapy, medication-assisted treatment, peer support, and long-term follow-up care.
• Reducing stigma and promoting early intervention improves access to care and supports long-term recovery outcomes.