Drug rehabilitation is the process of medical and therapeutic treatment designed to help someone stop using addictive substances and build a stable, substance-free life. It typically combines medical care, behavioral therapy, and ongoing support in a structured program that can last anywhere from a few weeks to several months. The three core goals of any rehab program are reducing or eliminating substance use, improving overall life functioning, and preventing relapse.
How Rehab Is Structured
Rehabilitation programs exist along a spectrum of intensity, matched to how severe a person’s substance use is and what kind of support they need. The American Society of Addiction Medicine defines three broad levels: outpatient treatment, intensive outpatient treatment, and residential (inpatient) care. A clinical assessment helps determine which level fits best, and people often move between levels as their needs change.
Outpatient programs allow you to live at home while attending scheduled therapy sessions, typically a few hours per week. Intensive outpatient programs require more time, often 9 to 20 hours per week, but still let you return home each day. Residential programs provide 24-hour care in a facility where you live full-time, with constant access to medical staff and structured daily schedules. The most common residential stays are 30, 60, or 90 days, though longer programs exist for people with more complex needs.
What Happens During Detox
For many people, rehab begins with medical detoxification, the process of safely clearing a substance from the body while managing withdrawal symptoms. Detox is supervised by doctors and nurses who monitor vital signs, provide medications to ease discomfort, and watch for dangerous complications. The timeline and intensity of withdrawal depend entirely on what substance is involved.
Heroin and other short-acting opioids produce withdrawal symptoms within 8 to 24 hours of the last dose, lasting 4 to 10 days. Longer-acting opioids like methadone take 12 to 48 hours to trigger withdrawal, which can stretch 10 to 20 days. Alcohol withdrawal is among the most medically serious: symptoms appear within 6 to 24 hours, peak in severity around 36 to 72 hours, and last 2 to 10 days. Benzodiazepine withdrawal can be particularly prolonged, lasting anywhere from 2 to 8 weeks or longer depending on the specific drug. Stimulant withdrawal tends to be shorter, typically 3 to 5 days, and cannabis withdrawal usually resolves within one to two weeks.
A typical detox period runs about 7 days and costs between $1,750 and $5,600. Detox alone is not treatment. It stabilizes the body so that the real therapeutic work can begin.
Therapies Used in Rehabilitation
The backbone of rehab is behavioral therapy, which teaches new ways of thinking about and responding to cravings, stress, and the situations that trigger substance use. Several evidence-based approaches are used, often in combination.
Cognitive-behavioral therapy (CBT) is one of the most widely used. It helps people identify the thought patterns and beliefs that drive substance use, then practice new coping strategies. Research shows CBT is effective at reducing both alcohol and drug use and at improving functioning in other areas of life. Relapse prevention training, which focuses specifically on recognizing early warning signs and building skills to handle high-risk situations, is an adaptation of CBT.
Motivational interviewing takes a different angle. Rather than teaching skills directly, it helps people work through their own ambivalence about change. A therapist guides the conversation so the person articulates their own reasons for recovery, which strengthens internal motivation. A structured version called motivational enhancement therapy, typically delivered over four sessions, has shown strong results for alcohol use disorders.
Most programs weave these approaches together alongside group therapy, peer support, family counseling, and life skills training. The common thread across all effective treatments is a focus on building motivation, developing coping skills, restructuring social environments, and strengthening a person’s confidence in their ability to stay sober.
Medication in Recovery
For certain substance use disorders, medication plays a critical role alongside therapy. This combination is sometimes called medication-assisted treatment.
Three FDA-approved medications target opioid use disorder. Methadone activates the same brain receptors as heroin or fentanyl, but much more slowly and for a longer duration. This means it eases withdrawal and cravings without producing the intense high. It has been used for over 50 years. Buprenorphine works similarly but activates those receptors to a lesser degree, and it can also block other opioids from having an effect. Naltrexone takes an entirely different approach: it blocks opioid receptors completely so that if someone does use, they feel no pleasurable effect. Evidence suggests it also reduces cravings on its own. Naltrexone is also approved for alcohol use disorder, making it one of the few medications that crosses both categories.
An additional medication called lofexidine is available specifically to manage the acute physical symptoms of opioid withdrawal, helping people get through detox more comfortably.
When Mental Health Disorders Are Also Present
A large number of people entering rehab also have a co-occurring mental health condition such as depression, anxiety, PTSD, or bipolar disorder. This is sometimes called a dual diagnosis. Treating one condition while ignoring the other almost always leads to poor outcomes, because untreated mental illness fuels substance use and vice versa.
The most effective approach is integrated treatment, where the same team addresses both conditions simultaneously rather than sending someone back and forth between separate mental health and addiction programs. Treatment is delivered in stages: early on, the focus is on building motivation and stabilizing symptoms. As a person progresses, cognitive-behavioral techniques address both the substance use and the mental health disorder together. Medications for psychiatric conditions are coordinated with any addiction medications so they work together rather than at cross-purposes.
Aftercare and Relapse Prevention
Completing a rehab program is a major milestone, but it is not the end of recovery. Relapse rates for substance use disorders fall between 40% and 60%, which is comparable to relapse rates for other chronic conditions like high blood pressure and asthma. This means that ongoing support after formal treatment is not optional; it is part of the treatment itself.
The primary tools of relapse prevention are cognitive therapy and mind-body relaxation techniques, both aimed at changing the negative thought patterns that precede a return to use. In practical terms, aftercare usually involves some combination of continued outpatient therapy, participation in self-help groups, and sometimes transitional housing. Joining a self-help group like Alcoholics Anonymous, Narcotics Anonymous, or one of their many equivalents has been shown to significantly improve long-term outcomes. The combination of a formal treatment program followed by active self-help group participation is the most effective path to sustained recovery.
Sober living homes offer another layer of support, providing a structured, substance-free living environment for people who have completed residential treatment but are not yet ready to return to fully independent life. These typically cost $1,500 to $2,000 per month.
What Rehab Costs
The average cost of drug rehabilitation per person is roughly $13,475, but the actual price varies enormously depending on the type and length of care. General outpatient rehab runs $1,400 to $10,000 for a 30-day period, with many centers offering 3-month programs for around $5,000 total. Intensive outpatient programs cost more, typically $15,000 to $19,500 for 30 days. Inpatient programs range from $5,000 to $20,000 for a 30-day stay, and 60- to 90-day programs can run $12,000 to $60,000. Luxury residential facilities can reach $80,000 or higher.
Health insurance significantly affects what you actually pay out of pocket. Federal parity laws require most insurance plans to cover substance use treatment at the same level they cover other medical conditions. State-run facilities may provide treatment at no cost for people who qualify. If cost is a barrier, starting with your state’s health department or SAMHSA’s national helpline can help you identify subsidized options in your area.