How Long Does Rehab for Alcohol or Drug Addiction Last, and What Determines the Length?

What Stages Addiction Treatment Consists Of

When people talk about “how long rehab takes,” they often mean only the time spent at the center. In reality, addiction treatment is a sequence of stages, each with its own purpose. The first stage is medical: detox and stabilization. The second is intensive rehabilitation, inpatient or day-patient, where the skills of sober living are built. The third is outpatient support and aftercare, when the person returns to their usual environment and learns to apply those skills in practice.

Skipping any stage reduces effectiveness. Detox without rehab relieves withdrawal but does not change behavior, so relapse often happens within the first few weeks. Rehab without support after discharge leaves the person alone with their triggers during the most vulnerable period.

Detox

Usually takes from a few days to 1–2 weeks. In alcohol dependence, acute withdrawal symptoms pass more quickly; with dependence on opioids or sedatives, or with combined use, stabilization may take longer and requires medical supervision.

Intensive rehabilitation

An inpatient program most often lasts from 28 days to 3–6 months. This is where the main work happens: individual and group psychotherapy, relapse prevention, and rebuilding a daily routine and relationships.

Aftercare

Regular sessions with a psychotherapist, groups, and consultations with an addiction doctor (narcologist) continue for at least several months, often for a year or longer. The intensity is gradually reduced as the person becomes more stable.

What Determines How Long Rehab Lasts

There is no single timeframe that fits everyone. The doctor and psychotherapist assess the situation at the start of treatment and refine the plan along the way. The more severe and longer-standing the addiction, the more time is needed to recover. What matters is not only how long someone has been using but also how badly the different areas of their life have been damaged: work, family, health, social circle.

Co-occurring mental health disorders play a major role. Depression, an anxiety disorder, PTSD, ADHD, or personality disorders require parallel treatment, and without it the risk of relapse is high. Previous treatment attempts are also significant: if a person has already been through short programs and relapsed quickly, it makes sense to choose a longer and more intensive format.

• The substance: alcohol, opioids, stimulants, sedatives, or combined use
• How long the person has been using and how severe the addiction is, including binges and severe withdrawal
• Physical health: liver, heart, nervous system, infections
• Co-occurring mental health disorders
• The patient’s motivation and readiness for change
• Previous treatment attempts and relapses
• Environment: family support, friends who use, housing, work

How Long Rehab for Alcoholism Lasts

In alcohol dependence, detox and medical help to stop a drinking binge usually take from a few days to a week; complicated withdrawal takes longer and must be managed only in an inpatient setting. An inpatient rehab program is most often designed for 1–3 months. After that, outpatient follow-up is recommended for at least six months, and ideally throughout the first year of sobriety.

One common mistake is to stop at binge detox and alcohol “coding” (a treatment widely used in Kazakhstan and CIS countries) without any psychotherapy. Such measures may support sobriety for a while, but they do not teach a person how to cope with stress, cravings, and the familiar situations in which they used to drink. Coding is appropriate only as part of comprehensive treatment, after an examination and a period of sobriety, and with the patient’s consent.

How Long Rehab for Drug Addiction Lasts

With drug addiction, recovery generally takes longer. Changes in the brain’s reward system, sleep problems, emotional instability, and cravings can persist for months after a person stops using. This condition is sometimes called post-acute withdrawal syndrome. That is why inpatient programs often last 3–6 months, and overall follow-up a year or more.

Opioid dependence requires a particularly careful approach: after a period of abstinence, tolerance drops, and going back to previous amounts of the drug carries a high risk of overdose. For this reason, relapse prevention, work with the family, and an action plan for cravings are an essential part of the program. Stimulant dependence is often followed by severe depression after withdrawal, which needs to be treated by a psychiatrist.

Why Short Rehab More Often Ends in Relapse

Addiction changes how the brain works: the reward system, the stress response, and impulse control. These changes do not disappear after a few weeks of sobriety. On top of that, the person has spent years developing automatic reactions — having a drink under stress, using with certain people or in certain places. Replacing them with new skills takes time and practice.

International standards for the treatment of substance use disorders note that the duration of engagement in treatment is linked to outcomes. This does not mean living in a center for years. Continuity matters more: the intensive stage should flow smoothly into outpatient support rather than stop abruptly on the day of discharge.

How to Tell When Rehab Can Be Completed

The decision to move to the next stage is made jointly by the patient, the psychotherapist, and the doctor. It is based not on the calendar but on the person’s condition: how stable their mood and sleep are, whether they understand their triggers, whether they have an action plan for cravings, whether relationships with loved ones have been restored, and whether they have something to occupy them and a supportive environment.

At the Narcology 24 clinic, the length of the program is discussed before treatment begins and reviewed as it progresses. We don’t keep a patient longer than necessary, and we don’t discharge them before they are ready. After the inpatient stage, we continue working on an outpatient basis or online: consultations with a psychotherapist and an addiction doctor, relapse-prevention groups, and family support.

• Mood and sleep are stable without using
• There is a clear action plan for cravings and high-risk situations
• The people and places that are best avoided for now have been identified
• A daily routine has been restored and there is work or another regular occupation
• The family knows how to give support and is receiving help too
• Sessions with a psychotherapist are scheduled for after discharge

When to see a doctor

• You can’t stop drinking or using on your own, or you relapse after a few days
• When you stop alcohol or a drug, you get tremors, sweating, insomnia, and anxiety
• Previous treatment was short and ended in a quick relapse
• The addiction is combined with depression, anxiety, or sleep problems
• After discharge from a center, your cravings have grown stronger and you feel you are losing control
• Your family doesn’t know which treatment format and length to choose

Questions and answers

Medically reviewed by

Nurlan Isayev, MDAddiction psychiatrist · experience 10 years

Synthetic stimulant and cannabis addiction, addiction in teenagers, gambling addiction and online follow-up.