Quick Summary
Withdrawal length depends heavily on the substance involved and the individual. For most substances, acute withdrawal runs from a few days to two weeks. Some withdrawals, including alcohol and benzodiazepine, can be medically dangerous and require clinical supervision. This guide walks through the most common substance withdrawal timelines based on guidance from the National Institute on Drug Abuse and other authoritative sources.
Key Takeaways
- Acute alcohol withdrawal typically lasts 3 to 7 days; severe cases can be life-threatening without medical care.
- Opioid withdrawal is generally not life-threatening on its own but is intensely uncomfortable. Acute phase peaks at 24 to 72 hours and improves over 5 to 10 days.
- Benzodiazepine withdrawal can last weeks or longer and requires a structured medical taper.
- Stimulant withdrawal is mostly psychological. Depression, fatigue, and cravings can last weeks to months.
- Post-acute withdrawal symptoms (mood, sleep, cognition) can persist for months across most substances.
“How long does withdrawal last?” is one of the most common questions families ask. The honest answer is, it depends. Substance, dose, frequency, length of use, and individual physiology all matter. The information below comes from guidance published by the National Institute on Drug Abuse and the WHO Clinical Guidelines for Withdrawal Management.
Alcohol
Symptoms begin 6 to 24 hours after the last drink and typically peak between 24 and 72 hours. Acute symptoms generally resolve within 3 to 7 days. About half of people with alcohol use disorder experience some withdrawal, and 3 to 5 percent develop severe withdrawal that can include seizures or delirium tremens. Severe alcohol withdrawal can be life-threatening. Heavy long-term drinkers should not stop without medical guidance.
Opioids
For short-acting opioids like heroin or fentanyl, symptoms begin 6 to 12 hours after the last dose, peak within 72 hours, and gradually improve over 5 to 10 days. For longer-acting opioids like methadone, the timeline stretches. Symptoms include muscle aches, nausea, vomiting, diarrhea, sweating, anxiety, and intense cravings. Withdrawal is not typically life-threatening but is extremely uncomfortable, and relapse during withdrawal raises overdose risk because tolerance drops quickly.
Benzodiazepines
Withdrawal typically begins 1 to 2 days after the last dose for short-acting benzodiazepines and can last 2 to 4 weeks or longer. Long-acting benzodiazepines may delay onset and prolong the timeline. Abruptly stopping benzodiazepines can be dangerous, including risk of seizures, severe anxiety, and panic attacks. A structured medical taper, managed by a clinician, is the safer path.
Stimulants (Cocaine, Methamphetamine)
Stimulant withdrawal is primarily psychological. Symptoms begin within 24 hours of the last use, peak around days 2 to 5, and acute symptoms typically resolve within 3 to 5 days. The harder part for many people is post-acute: fatigue, depression, anhedonia, and cravings can persist for weeks to months. For people with co-occurring mental health conditions, this window deserves close attention.
Marijuana
Cannabis withdrawal is real but typically milder than other substances. Symptoms include irritability, sleep difficulty, decreased appetite, restlessness, and cravings, usually beginning 1 to 3 days after last use. Acute symptoms resolve within 1 to 2 weeks for most people, though sleep problems can linger longer.
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Post-Acute Withdrawal
For most substances, a longer phase often follows the acute period. This is sometimes called post-acute withdrawal syndrome (PAWS). It includes lingering sleep disruption, mood changes, anxiety, and difficulty concentrating that can persist for months. Continued treatment, peer support, and time all help.
Why Setting Matters
For alcohol and benzodiazepine withdrawal, medical supervision is not optional for many people. For opioids and stimulants, supervised settings reduce suffering and lower the chance of returning to use during the most vulnerable window. Medications, monitoring, and clinical support can transform a withdrawal experience from white-knuckle to manageable.
Talking With a Professional
The right starting point is a brief assessment with a qualified clinician who can recommend the right setting for withdrawal management based on substance, history, and current health. The admissions team at Discovery Point Retreat can walk you through what an assessment involves and what options exist.
References
- National Institute on Drug Abuse. Treatment approaches and withdrawal. Accessed June 8, 2026. nida.nih.gov.
- Substance Abuse and Mental Health Services Administration. Withdrawal management. Accessed June 8, 2026. samhsa.gov.
- Delirium Tremens / alcohol and benzodiazepine withdrawal. StatPearls. Accessed June 8, 2026. ncbi.nlm.nih.gov.
Resources
- 988 Suicide and Crisis Lifeline. Call or text 988, or chat at 988lifeline.org. Free, confidential support 24/7.
- SAMHSA National Helpline. Call 1-800-662-HELP (4357) or visit the SAMHSA National Helpline page for free, confidential referrals to local treatment.
- 911. For any medical emergency, including suspected overdose or withdrawal complications, call 911 immediately. If naloxone is available for a suspected opioid overdose, administer it according to the package instructions while waiting for help.
This article is general education and is not medical advice. It does not establish a clinician-patient relationship and is not a substitute for an individual assessment by a qualified mental health or addiction treatment professional.
