How Long Does Withdrawal Last? (By Substance)

One of the most common questions people have before entering detox — or before they’ve even decided to seek help — is simply: how long will this last?

It’s a fair question, and an important one. Knowing what to expect doesn’t make withdrawal easy, but it makes it less frightening. And for a lot of people, the fear of withdrawal — not knowing what’s coming or when it will end — is one of the biggest things standing between where they are and the decision to get help.

The honest answer is that withdrawal timelines vary considerably depending on the substance involved, how long and how much someone has been using, their age and general health, and whether they have medical support. But there are general patterns for each substance that give a meaningful picture of what the process looks like.

This guide breaks down withdrawal by substance — the typical onset, the peak, and the approximate duration — along with what you need to know about the risks and the role of medical support.

A Note Before We Start: Withdrawal Is Not One-Size-Fits-All

Every person’s body is different, and the experience of withdrawal is shaped by factors that are personal and specific. Someone who has been drinking a bottle of spirits daily for twenty years will have a significantly different alcohol withdrawal experience than someone who has been drinking heavily for two years. A person with a history of seizures faces different risks than someone without.

What the timelines below describe are typical patterns — useful for orientation, not prediction. They should be understood in the context of one key principle: for several substances, withdrawal is a medical event, not just a physical discomfort. The decision to stop using those substances should be made with medical support in place, not alone.

Alcohol Withdrawal

Alcohol withdrawal is one of the most medically serious of all substance withdrawals, and one that should almost never be attempted without clinical supervision.

As the brain recalibrates from chronic alcohol exposure, it enters a state of neurological overexcitation. In the first 6 to 24 hours, early symptoms begin: anxiety, irritability, nausea, sweating, elevated heart rate, and tremors. These can feel like a severe hangover — and some people mistakenly believe they are through the worst of it.

By 24 to 48 hours, symptoms typically intensify. In some people — particularly those with long-term heavy use or a history of prior withdrawals — hallucinations can occur. Between 48 and 72 hours, the risk of delirium tremens (DTs) peaks. Delirium tremens is a life-threatening condition involving profound confusion, uncontrolled shaking, high fever, cardiovascular instability, and seizures. Without medical treatment, DTs carry a historically high mortality rate. With appropriate clinical intervention, that risk drops dramatically.

The acute physical phase of alcohol withdrawal typically resolves within 5 to 10 days. However, psychological symptoms — dysphoria, anxiety, poor sleep, cognitive fog, and depression — can persist for weeks to months as the brain gradually restores its baseline neurochemistry (Post-Acute Withdrawal Syndrome, or PAWS).

Medical support is essential for alcohol withdrawal. A medically supervised detox can prevent seizures, manage complications, and make the process significantly safer and more manageable.

Opioid Withdrawal

Opioid withdrawal is rarely directly life-threatening in otherwise healthy adults, but it is intensely physically distressing — and that intensity drives very high rates of relapse without support.

Early symptoms in the first 8 to 24 hours include anxiety, restlessness, yawning, watery eyes, runny nose, and muscle aches — similar to the onset of a bad flu. By 36 to 72 hours, symptoms reach their peak: intense muscle cramping, bone pain, severe nausea, vomiting, diarrhea, profuse sweating, chills, and goosebumps — the origin of the phrase “cold turkey.” Insomnia is almost universal, and the psychological distress — anxiety, agitation, intense cravings — is often the most difficult part.

The primary dangers are dehydration from severe vomiting and diarrhea, and the risk of relapse. After even a short period of abstinence, tolerance drops significantly. A return to the same dose that was used before withdrawal can result in fatal overdose — and with fentanyl contamination widespread in the illicit supply, this risk is acute.

Medications like buprenorphine and methadone are highly effective at managing opioid withdrawal symptoms, reducing cravings, and supporting sustained recovery. Medical support transforms what is otherwise a grueling experience into something manageable.

Benzodiazepine Withdrawal

Benzodiazepine withdrawal is one of the most medically dangerous substance withdrawals — comparable to alcohol in its risks, and arguably more unpredictable in its timeline.

Like alcohol, benzodiazepines work on the GABA system. The brain’s compensatory adaptations create a state of neurological hyperexcitability when the drug is removed — which can manifest as seizures, severe anxiety, psychosis, and in serious cases, death. This risk applies even to people who have been taking benzodiazepines at prescribed therapeutic doses for extended periods.

Short-acting benzodiazepines (Xanax, Ativan) can begin withdrawal within 24 hours. Long-acting versions (Valium, Klonopin) may not show withdrawal symptoms for several days. The acute phase peaks in the first one to two weeks with intense anxiety, panic attacks, insomnia, tremors, sweating, heart palpitations, and in severe cases, seizures and psychosis.

A significant subset of people experience protracted benzodiazepine withdrawal syndrome — a prolonged constellation of symptoms including anxiety, cognitive difficulties, and insomnia that can persist for months. It does improve over time.

Benzodiazepine withdrawal should never be attempted without medical supervision. A supervised taper using a long-acting benzodiazepine is the standard of care — abrupt discontinuation is dangerous and associated with serious complications.

Stimulant Withdrawal (Cocaine and Methamphetamine)

Stimulant withdrawal is primarily psychological rather than physically dangerous in the acute medical sense — but that description can be misleading, because the psychological intensity can be extreme.

The first phase — “the crash” — begins within hours of the last use with profound fatigue, increased sleep, and increased appetite. This is followed by the more sustained withdrawal phase: persistent depression, anhedonia (the inability to feel pleasure), low energy, intense cravings, and anxiety. This reflects the dopamine depletion that stimulant use produces — the brain’s reward system is now significantly underactive, and the result is a flatness that can feel unbearable.

For methamphetamine, this phase tends to be longer and more severe than for cocaine, reflecting meth’s more profound neurological disruption. Post-acute symptoms including depression, cognitive difficulties, and sleep disturbances can persist for weeks to months.

The primary risks during stimulant withdrawal are relapse driven by psychological distress and, in severe cases, suicidal ideation. Clinical monitoring and psychological support are important during this phase.

Cannabis (Marijuana) Withdrawal

Cannabis withdrawal is often minimized or dismissed — and for occasional users, the experience may be mild. But for people with significant daily use, particularly long-term use of high-potency products, withdrawal can be genuinely disruptive.

Symptoms include irritability, anxiety, restlessness, decreased appetite, insomnia, vivid or disturbing dreams, depression, and physical symptoms like nausea, sweating, and headaches. Sleep disruption — insomnia and vivid dreaming that can persist for weeks — is the most commonly reported difficult symptom.

Cannabis withdrawal is not medically dangerous, but it is real, and for many people it is the primary driver of early relapse. Having support during this period significantly improves the chances of getting through it.

Prescription Stimulant Withdrawal (Adderall, Ritalin)

Prescription stimulant withdrawal follows a similar pattern to cocaine and methamphetamine withdrawal, though generally with less intensity. Fatigue, depression, increased sleep, irritability, and difficulty concentrating are the predominant symptoms. Cravings can be significant, particularly in people who have been using at high doses or for extended periods.

Post-Acute Withdrawal Syndrome (PAWS): The Second Phase

For many substances — particularly alcohol, opioids, and benzodiazepines — there is a second phase of withdrawal that extends well beyond the acute physical symptoms. Post-Acute Withdrawal Syndrome (PAWS) describes a cluster of persistent neurological and psychological symptoms that can last weeks to months as the brain gradually restores its pre-addiction baseline.

PAWS symptoms commonly include mood instability, anxiety, difficulty concentrating, sleep disruption, fatigue, and reduced ability to experience pleasure. These symptoms come and go — often intensified by stress — and are one of the most significant contributors to relapse in early recovery.

Understanding PAWS matters because people in this phase can feel like something is permanently wrong with them, when in fact their brain is in the process of healing. That healing takes time — but it does happen.

Why Medical Support Changes Everything

The timelines above are a map. But walking through withdrawal alone versus with a medical team alongside you is the difference between navigating unfamiliar terrain without a guide and having someone who knows every step of the path.

Medical supervision during detox means dangerous complications can be identified and managed before they become crises. It means medications are available to significantly reduce the intensity of withdrawal symptoms. It means the process is monitored, supported, and as safe as it can possibly be. It also means a higher rate of completing detox successfully — which matters because completing detox is what opens the door to the treatment that addresses the deeper roots of addiction.

At Bodhi Addiction, we help individuals and families find the right level of care for every stage of the recovery journey — including medically supervised detox, residential treatment, and ongoing support. Whether you’re trying to understand what withdrawal will look like for your specific situation or you’re ready to take the next step, our team is here to help.