Understanding Addiction: How Substance Use Disorder Develops

Addiction - clinically known as substance use disorder (SUD) - is a treatable, chronic medical condition involving complex interactions among brain circuits, genetics, the environment, and a person’s life experiences. It is not a moral failing or a lack of willpower.

How addiction affects the brain

Repeated substance use can change the brain’s reward, stress, and self-control systems. These changes help explain why quitting is so difficult and why relapse is common - and why effective treatment usually addresses the whole person, not just the substance.

Common signs of substance use disorder

• Using more of a substance, or for longer, than intended
• Strong cravings or urges to use
• Continuing to use despite harm to health, work, or relationships
• Needing more of the substance to get the same effect (tolerance)
• Withdrawal symptoms when not using

If several of these sound familiar, talking with a healthcare professional is a good next step.

Paths to recovery

Recovery looks different for everyone. Evidence-based options include behavioral therapies, FDA-approved medications for certain substances, peer support, and treatment programs at different levels of care. Many people recover and go on to live healthy, meaningful lives.

If you or someone you love is struggling, you are not alone. Call or text 988 (US) anytime, or contact SAMHSA’s National Helpline at 1-800-662-HELP (4357) for free, confidential treatment referrals.

Sources

• National Institute on Drug Abuse (NIDA) - Drug Misuse and Addiction and Treatment and Recovery
• MedlinePlus (U.S. National Library of Medicine) - Drug Use and Addiction
• Substance Abuse and Mental Health Services Administration (SAMHSA) - National Helpline