Editorial Director, Addiction & Recovery · Last reviewed January 2025
Addiction is a complex, chronic medical condition characterized by compulsive substance use despite harmful consequences. The American Society of Addiction Medicine (ASAM) defines addiction as a treatable, chronic medical disease involving complex interactions among brain circuits, genetics, the environment, and an individual's life experiences. People with addiction use substances or engage in behaviors that become compulsive and often continue despite harmful consequences.
The critical word in that definition is treatable. Addiction is not a moral failing, a lack of willpower, or a character defect. It is a disease of the brain — one that changes how the brain responds to reward, stress, and self-control. And like other chronic diseases such as diabetes or hypertension, it responds to evidence-based treatment.
This section of Holy Rosary Healthcare provides comprehensive educational resources on addiction recovery: what treatment looks like, how to find it, what the evidence says about what works, and how families can support someone they love through the process.
Understanding Addiction
Substance use disorders (SUDs) exist on a spectrum. The DSM-5 (Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition) classifies SUDs by severity — mild, moderate, or severe — based on the number of diagnostic criteria met over a 12-month period. These criteria include things like taking a substance in larger amounts than intended, unsuccessful efforts to cut down, spending a great deal of time obtaining or recovering from the substance, craving, and continued use despite physical or psychological problems caused by the substance.
According to the 2021 National Survey on Drug Use and Health, approximately 46.3 million people aged 12 or older in the United States met criteria for a substance use disorder in the past year. Of those, only about 6.3 million — roughly 13.5% — received any substance use treatment. The treatment gap is enormous.
Substance use disorders commonly involve alcohol, opioids, stimulants (cocaine, methamphetamine), benzodiazepines, and cannabis. Each substance has its own pattern of dependence, withdrawal profile, and treatment considerations. The substance use section of this site covers each in detail.
The Connection Between Addiction and Mental Health
Addiction rarely exists in isolation. According to SAMHSA, approximately 9.2 million adults in the United States have a co-occurring disorder — both a substance use disorder and a mental health condition occurring simultaneously. The most common pairings include depression and alcohol use disorder, anxiety disorders and benzodiazepine dependence, PTSD and opioid use disorder, and ADHD and stimulant use.
This intersection matters enormously for treatment planning. Research consistently shows that treating only the addiction — without addressing the underlying or co-occurring mental health condition — produces worse outcomes than integrated treatment that addresses both simultaneously. Our co-occurring disorders section covers dual diagnosis treatment in depth.
What Addiction Recovery Involves
Recovery is not a single event — it is a process. The Substance Abuse and Mental Health Services Administration defines recovery as "a process of change through which individuals improve their health and wellness, live self-directed lives, and strive to reach their full potential." Treatment is typically the beginning of that process, not the entirety of it.
Effective addiction treatment involves multiple elements:
- Assessment and individualized treatment planning — Matching treatment intensity and type to the individual's clinical needs, using tools like the ASAM Criteria
- Detoxification and medical stabilization (when indicated) — Managing withdrawal safely under medical supervision
- Evidence-based behavioral therapies — Cognitive Behavioral Therapy (CBT), Motivational Interviewing (MI), Contingency Management, 12-step facilitation
- Medication-assisted treatment (MAT) — FDA-approved medications for opioid use disorder (buprenorphine, methadone, naltrexone) and alcohol use disorder (naltrexone, acamprosate, disulfiram)
- Continuing care and relapse prevention — Transitioning through levels of care, building recovery support networks, and developing relapse prevention strategies
- Treatment for co-occurring mental health conditions — Integrated behavioral health treatment when applicable
Explore the Addiction Recovery Vertical
Evidence-Based Approaches to Treatment
The treatment of substance use disorders has a robust evidence base. Several behavioral and pharmacological interventions have been studied extensively in randomized controlled trials and have demonstrated meaningful efficacy. NIDA identifies five key principles of effective treatment in its landmark publication Principles of Drug Addiction Treatment: A Research-Based Guide:
- Addiction is a complex but treatable disease that affects brain function and behavior
- No single treatment is appropriate for everyone
- Treatment needs to be readily available
- Effective treatment attends to multiple needs of the individual, not just their drug abuse
- Remaining in treatment for an adequate period of time is critical
The guide also notes that treatment doesn't have to be voluntary to be effective — many individuals who initially enter treatment under legal pressure show outcomes as good as those who enter voluntarily. This finding is important for families and courts navigating reluctant patients.
The Role of Time in Recovery
Research consistently shows that longer time in treatment is associated with better outcomes. NIDA recommends that most people with significant substance use disorders need at least three months in treatment to significantly reduce or stop drug use, and that the best outcomes occur with longer durations. This has important implications for treatment planning — programs that last only 28 days may not be adequate for moderate-to-severe disorders, regardless of their quality.
Recovery is also a long-term process. Studies of people in recovery from alcohol and opioid use disorders show that most relapses occur in the first year — and that the probability of sustained recovery increases significantly with each year of abstinence. The goal of treatment is not just acute stabilization but building the skills, supports, and neurological recovery needed for long-term change.
For addiction treatment resources, SAMHSA's National Helpline (1-800-662-4357) provides free, confidential treatment referrals 24/7. For individuals in mental health crisis, call or text 988.