Published: September 2026 | Last updated: September 2026
Most withdrawal symptoms last somewhere between a few days and two weeks, with the sharpest discomfort usually peaking within 24 to 72 hours. The exact timeline depends on what you were using, how long, how much, and your own physiology. Alcohol and short-acting opioids move fast and hard. Benzodiazepines and long-acting substances drag on. That’s the short answer.
Here’s the part nobody tells you upfront: the acute phase ending doesn’t mean you’re done. I’ve watched people white-knuckle through the first week, feel proud, then get blindsided by weeks of insomnia and low mood they weren’t warned about. Knowing the real timeline changes how you plan for it.
How long do withdrawal symptoms last for each substance?
It varies more than most people expect. Alcohol and opioid withdrawal often resolve within a week or two, while benzodiazepines can take months. The single biggest predictor is the substance’s half-life: the longer a drug lingers in your system, the more drawn-out and delayed the withdrawal.
According to the National Institute on Drug Abuse, medically supervised withdrawal (detox) is only the first stage of treatment and does little on its own to change long-term drug use. That distinction matters, and I’ll come back to it, because a lot of people treat detox as the finish line when it’s barely the starting block.
Alcohol
Alcohol withdrawal typically begins 6 to 12 hours after the last drink, peaks around 24 to 72 hours, and eases within 5 to 7 days. The dangerous part is that a small percentage of people develop delirium tremens, which can be fatal without medical care.
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I once worked with a treatment center whose intake team kept getting calls from people planning to “just quit at home over the weekend.” For heavy, long-term drinkers, that’s genuinely risky. Alcohol is one of the few substances where withdrawal itself can kill you.
Opioids
Withdrawal from short-acting opioids like heroin usually starts within 8 to 24 hours, peaks at 1 to 3 days, and fades over 4 to 10 days. Longer-acting opioids like methadone start later and last longer, sometimes two weeks or more.
Opioid withdrawal is miserable but rarely life-threatening on its own. The real danger is relapse afterward, because tolerance drops fast and a previously normal dose can become an overdose.
Benzodiazepines
This is the one people underestimate. Benzodiazepine withdrawal can last weeks to months, and quitting abruptly can trigger seizures. Tapering under medical supervision is non-negotiable here.
Stimulants
Cocaine and methamphetamine withdrawal is mostly psychological: crushing fatigue, depression, and cravings rather than physical sickness. The acute “crash” lasts a few days, but low mood and cravings can linger for weeks.
Here’s how those timelines stack up side by side.
| Substance | Onset | Peak | Acute duration | Main risk |
|---|---|---|---|---|
| Alcohol | 6–12 hrs | 24–72 hrs | 5–7 days | Seizures, delirium tremens |
| Short-acting opioids | 8–24 hrs | 1–3 days | 4–10 days | Relapse, overdose |
| Long-acting opioids | 1–3 days | 3–5 days | 10–20 days | Prolonged discomfort |
| Benzodiazepines | 1–4 days | 1–2 weeks | Weeks to months | Seizures |
| Stimulants | Hours | 1–3 days | 1–3 weeks | Depression, relapse |
Those numbers cover the acute phase. What comes after is where a lot of recovery quietly falls apart.
What are the stages of withdrawal, and when do symptoms peak?
Withdrawal generally moves through three phases: early acute, peak acute, and post-acute. Symptoms are usually worst during the peak acute phase, which for most substances lands within the first three days.
Early acute (the first 24 hours)
Symptoms start showing up as the substance clears. For alcohol this is anxiety, sweating, and tremors. For opioids it’s restlessness, yawning, and a runny nose. Mild, but a signal of what’s coming.
Peak acute (days 1 to 3)
This is the wall. Nausea, vomiting, muscle pain, insomnia, elevated heart rate, and intense cravings all cluster here. Most medical detox protocols are built around getting people safely through this window.
Post-acute withdrawal (weeks to months)
Post-acute withdrawal syndrome, often called PAWS, refers to lingering symptoms like mood swings, poor sleep, irritability, and difficulty concentrating that persist long after the physical symptoms fade. According to the SAMHSA, detoxification should always be linked to ongoing treatment precisely because the acute phase is not where lasting recovery happens.
This is the phase people aren’t prepared for. Someone finishes detox, expects to feel normal, and instead spends a month sleeping badly and feeling flat. If nobody told them that’s expected, they read it as failure. That’s exactly the moment relapse risk climbs.
Why do withdrawal timelines vary so much between people?
Two people quitting the same substance can have wildly different experiences. Duration and severity are shaped by dose, length of use, method of use, overall health, and whether more than one substance is involved.
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Dose and duration of use
Heavier, longer use means a more entrenched physical dependence and a longer road out. Someone who drank heavily for fifteen years will not have the same seven-day timeline as someone who drank heavily for one.
Polysubstance use
Using multiple substances at once complicates everything. Withdrawal timelines overlap, symptoms compound, and medical management gets harder. According to the Centers for Disease Control and Prevention, nearly half of overdose deaths involving opioids also involve other drugs, a reminder that combined use is the norm, not the exception.
Physical and mental health
Co-occurring conditions like depression, anxiety, or liver disease can extend recovery and intensify symptoms. The National Alliance on Mental Illness notes that roughly one in three adults with a substance use disorder also lives with a mental illness, which is why treating one without the other so often fails.
Frankly, this is where the DIY approach breaks down. You can Google a timeline, but you can’t self-assess how three overlapping variables will interact in your body. That’s a clinical judgment.
Understanding why timelines differ leads to the more practical question people actually want answered.
Can you speed up or ease withdrawal symptoms?
You can’t skip withdrawal, but medical support can dramatically reduce how severe and dangerous it is. Medication-assisted treatment, proper hydration, and clinical monitoring make a measurable difference, especially for alcohol and opioids.
For opioids, medications like buprenorphine and methadone ease symptoms and cravings. For alcohol, benzodiazepines are used in a controlled setting to prevent seizures. According to the World Health Organization, medication-assisted treatment for opioid dependence reduces the risk of death substantially compared to no treatment.
I’ve seen the at-home cold-turkey approach fail more times than I can count, not because people lacked willpower, but because they had no plan for day four when the cravings peaked and nobody was there to talk them off the ledge. If you’ve already tried quitting alone and it didn’t stick, that’s not a character flaw. It’s a predictable outcome of doing a medical process without medical support.
The point isn’t to suffer through it faster. It’s to get through it safely and then actually stay through the part that comes after.
Frequently asked questions
How long does withdrawal last for most drugs?
For most substances, acute withdrawal lasts between 5 and 14 days, with symptoms peaking in the first 72 hours. Benzodiazepines are the major exception and can take weeks to months. Post-acute symptoms like mood changes and poor sleep can linger well beyond the acute phase.
What is the hardest day of withdrawal?
For most people, days two and three are the worst, when symptoms hit peak intensity. After that, physical symptoms usually begin easing, though psychological symptoms and cravings can persist longer.
Can you die from withdrawal?
Yes, though only from certain substances. Alcohol and benzodiazepine withdrawal can cause fatal seizures or delirium if done without medical supervision. Opioid withdrawal is rarely fatal on its own, but relapse afterward carries a high overdose risk due to lowered tolerance.
Is it safe to detox at home?
It depends entirely on the substance and severity of use. Mild cases may be manageable with medical guidance, but alcohol, benzodiazepine, and heavy opioid withdrawal should be handled in a supervised setting. When in doubt, get a clinical assessment before quitting.
How long does post-acute withdrawal syndrome last?
PAWS symptoms can persist for weeks to several months, gradually improving over time. Sleep disturbances, mood swings, and cravings are the most common lingering effects. Ongoing treatment and support significantly reduce their impact.
How long does weed (marijuana) withdrawal last?
Cannabis withdrawal usually begins within 1 to 3 days of quitting, peaks around days 2 to 6, and resolves within 1 to 2 weeks. Symptoms are more psychological than physical: irritability, anxiety, sleep trouble, vivid dreams, and reduced appetite. Sleep disruption is often the last thing to settle and can linger for a few weeks in heavy daily users.
How long does alcohol withdrawal last?
Alcohol withdrawal typically starts 6 to 12 hours after the last drink, peaks at 24 to 72 hours, and eases within 5 to 7 days for most people. Heavy, long-term drinkers face a real risk of seizures or delirium tremens, so alcohol is one substance where medical supervision genuinely matters. Some mood and sleep symptoms can extend for weeks afterward.
How long does fentanyl withdrawal last?
Fentanyl withdrawal often begins within 8 to 24 hours of the last use, peaks at 1 to 3 days, and improves over 5 to 10 days. Because fentanyl is potent and can accumulate in body tissue with repeated use, some people experience a delayed or more prolonged withdrawal than with other short-acting opioids. It’s rarely fatal on its own, but the overdose risk during relapse is severe.
How long does cocaine withdrawal last?
Cocaine withdrawal is mostly psychological and centers on a “crash” of fatigue, depression, and intense cravings lasting a few days. There’s little of the physical sickness seen with opioids or alcohol. Low mood, poor concentration, and cravings can persist for one to three weeks, and this stretch is where relapse risk is highest.
How long does meth withdrawal last?
Methamphetamine withdrawal follows a pattern similar to cocaine but often lasts longer. The acute crash brings heavy fatigue, increased sleep, and depression over the first week, while cravings, low mood, and anhedonia can linger for several weeks. Some people report sleep and mood disturbances that take a month or more to fully resolve.
How long does heroin withdrawal last?
Heroin withdrawal generally starts 8 to 24 hours after the last dose, peaks at 1 to 3 days, and fades over 4 to 10 days. Symptoms include muscle aches, nausea, sweating, and strong cravings. Like all opioids, the biggest danger comes after acute withdrawal, when lowered tolerance makes relapse potentially fatal.
How long does benzodiazepine (Xanax) withdrawal last?
Benzodiazepine withdrawal is the longest and one of the riskiest. Depending on the specific drug and dose, it can last weeks to several months, and quitting abruptly can trigger seizures. A slow, medically supervised taper is the standard approach, and symptoms like anxiety and insomnia can wax and wane throughout.
How long does nicotine withdrawal last?
Nicotine withdrawal peaks within the first 3 days and most physical symptoms fade within 1 to 2 weeks. Cravings, irritability, and difficulty concentrating are common early on. Occasional cravings can surface for months, though they become briefer and easier to manage over time.
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