Drug and alcohol rehab can last from a few weeks to a few months, but there is no single number of days that fits everyone. A 30-day or 90-day program is a program format, not a finish line: the right length depends on your health, the substance involved, withdrawal risk, home situation, and the support you will have after the first phase of care.
If you have seizures, confusion, hallucinations, chest pain, trouble breathing, a very fast heartbeat, severe vomiting, or thoughts of suicide or self-harm, call 911 now. Withdrawal from alcohol, opioids, and benzodiazepines can be dangerous and needs medical care. You can also call SAMHSA’s free, confidential, 24/7 National Helpline at 1-800-662-HELP (4357), text 435748, or use FindTreatment.gov. For a suicide or mental-health crisis, call, text, or chat 988.
How long does rehab usually last?
NIDA’s treatment guide says residential programs commonly provide extended care for a few weeks to a few months, with longer-term residential care also available. Inpatient care may involve an overnight stay for a few days or weeks when someone needs 24-hour care or withdrawal management.
That range explains why you see 30-day and 90-day programs so often. Those names tell you how a program is organized. They do not tell you how long you personally need care, whether you need residential care, or what support should follow it.
| Care setting | What it means | What decides the fit |
|---|---|---|
| Outpatient | Regular counseling, medication support, or both while you live at home. | Your assessment, safety, and ability to use support outside appointments. |
| Intensive outpatient or partial hospitalization | More coordinated outpatient care for complex needs. | The intensity of support you need without a 24-hour stay. |
| Residential | Twenty-four-hour treatment in a residential setting. | Your medical, mental-health, social, and substance-use needs. |
| Intensive inpatient | Medically directed 24-hour services that may manage withdrawal. | Medical needs and withdrawal risk. |
The four levels above come from the NIAAA Alcohol Treatment Navigator. The important question is not which label sounds strongest. It is which level matches what is happening in your life right now.
Is two weeks in rehab enough?
Two weeks may be the length of one program or one part of care, but it is not a research-based promise that someone is finished. NIDA explains that treatment can continue across settings, including outpatient, inpatient, residential, and opioid treatment programs. A person may move between levels as their needs change.
For alcohol treatment, NIAAA says a full assessment should look beyond alcohol or drug use. It should include physical health, mental health, other substances, housing, work, transportation, family support, and legal concerns. That fuller picture helps a provider build a plan and revise it as progress or setbacks occur.
Detox is also not the same as complete treatment. NIDA explains that detoxification alone is not sufficient for recovery and should be followed by treatment. This is why it helps to ask what comes after the initial stay before you enroll.
What decides whether you need 30 days, 90 days, or another plan?
A good program starts with an assessment, then builds care around you. NIAAA says higher-quality alcohol treatment includes qualified staff, a comprehensive assessment, a personalized plan, research-based care, and continuing recovery support.
- Your withdrawal and medical needs.
- Your use of alcohol, opioids, or other substances.
- Your mental health and physical health.
- Your housing, transportation, work, family, and social support.
- Whether outpatient, residential, or inpatient care is the safe and practical match.
- What support and follow-up will be in place after the initial program.
NIAAA specifically warns against a provider that promises a cure in a set period or uses the same plan for every person. Treatment should be adjusted as your needs change.
What happens after the first rehab stay?
Rehab is usually one part of a longer recovery plan. NIAAA calls the next steps continuing care, aftercare, or a discharge plan. That plan can include ongoing counseling, medical follow-up, support groups, and a clear response if a return to use happens.
NIDA describes a return to use as a sign that treatment may need to resume, change, or take a new direction. It does not mean that care has failed. NIDA says studies show 12-step programs can be very effective at supporting long-term recovery.
Housing and social-services support can be part of a continuing-care plan.
What kind of treatment should a program offer?
There are more choices than residential rehab alone. NIAAA describes professional alcohol treatment as talk therapy, medications, or both. SAMHSA says medications combined with counseling and behavioral therapies offer a whole-person approach for substance use disorders. A clinician decides whether medication is appropriate; do not start, stop, or change a prescribed medicine on your own.
For opioid use disorder, the FDA describes three approved medications and says they are effective treatment options. The approach and length of treatment are clinical decisions made with the person receiving care.
Complementary approaches may be part of a broader personal wellness plan, but they should not replace assessment or evidence-based treatment for a substance use disorder. Our guide to complementary versus alternative care explains that distinction. If you use supplements alongside prescription medicines, keep a current list and use these interaction questions when speaking with your clinician.
How do you choose a rehab program without getting pushed into the wrong one?
Ask each program how it completes an assessment, who will provide care, what level of care it recommends and why, and what happens after discharge. NIAAA recommends checking that a program has a current state license and asking whether it has independent accreditation. CARF is an independent nonprofit accreditor, and NIAAA identifies CARF and The Joint Commission as common accreditation organizations for addiction treatment programs.
Ask for the expected cost in writing. HealthCare.gov says Marketplace plans cover mental-health and substance-use-disorder services as essential health benefits, though your specific benefits depend on your plan and state. SAMHSA notes that sliding-fee scales, grants, scholarships, charity care, payment plans, and free or low-cost services may be available.
Be careful with offers that focus on free travel, cash, or a fast enrollment decision. A 2023 qualitative study in BMC Health Services Research, based on interviews with 20 people with opioid use disorder and 20 professionals, described financial enticements and patient brokering as barriers to appropriate care. The U.S. Department of Justice has also prosecuted illegal kickback schemes tied to treatment referrals.
Your next-step checklist
What to compare
- State license, independent accreditation, and staff credentials.
- Whether the program completes a full assessment before setting length of stay.
- Its counseling, medical, medication, and continuing-care options.
- Its written estimate, insurance coverage, copayments, and extra charges.
What to track
- Substances used, withdrawal symptoms, past treatment, and current prescriptions.
- Physical and mental-health concerns.
- Housing, work, caregiving, transportation, and support needs.
What to bring
- Your insurance information, medication list, and questions about cost.
- A trusted support person if you want help remembering answers.
What to ask
- “How will you decide the right level and length of care for me?”
- “Who will assess my medical and mental-health needs?”
- “What is the continuing-care plan after this program ends?”
- “What will I owe, and can you put that in writing?”
If urgent symptoms return or you feel at risk of harming yourself, call 911. For free, confidential treatment referral and information in English or Spanish, call 1-800-662-HELP (4357), text 435748, or use FindTreatment.gov. Call, text, or chat 988 for immediate crisis support.
By CenterForHealthAndHealing.org Research Team