Withdrawal timelines vary significantly depending on the substance, but most acute physical symptoms resolve within one to four weeks. Some substances clear in under a week, while others can produce lingering psychological symptoms for months. Here’s what to expect for the most common types of withdrawal.
Alcohol Withdrawal
Alcohol withdrawal is one of the faster timelines but also one of the most medically serious. Tremors typically begin 5 to 10 hours after the last drink and peak at 24 to 48 hours. Seizures can occur 6 to 48 hours after the last drink, with the highest risk at the 24-hour mark. The most dangerous complication, delirium tremens, usually begins two to three days after the last drink but can be delayed by more than a week. Its peak intensity hits around four to five days.
The full acute withdrawal window for alcohol runs about 5 to 7 days for most people. Mild cases may involve only tremors, anxiety, and insomnia. Severe cases require medical supervision because alcohol is one of the few substances where withdrawal itself can be life-threatening.
Opioid Withdrawal
The timeline for opioid withdrawal depends on whether you were using short-acting or long-acting opioids. With fast-acting opioids like heroin or oxycodone, symptoms typically start 6 to 12 hours after the last dose, peak around days 2 to 3, and resolve within 5 to 7 days. The experience often includes muscle aches, sweating, nausea, diarrhea, and intense restlessness.
Long-acting opioids like methadone follow a slower curve. Symptoms may not appear until 1 to 3 days after the last dose, tend to be less intense, but can stretch on for several weeks. Methadone withdrawal specifically may last 14 to 21 days. The total acute window for opioids overall is roughly 4 to 10 days.
Benzodiazepine Withdrawal
Benzodiazepines have one of the longest and most variable withdrawal timelines. Acute symptoms generally last 5 to 28 days, though some people experience symptoms for several months. With a gradual taper (slowly reducing the dose rather than stopping abruptly), the process typically spans 3 to 5 weeks.
What makes benzodiazepine withdrawal distinct is the risk of protracted symptoms. An estimated 10 to 25% of people who used benzodiazepines for extended periods experience withdrawal symptoms lasting 12 months or longer. These tend to be psychological: anxiety, insomnia, difficulty concentrating, and mood instability that waxes and wanes over time.
Nicotine Withdrawal
Nicotine withdrawal is relatively short. Symptoms hit hardest in the first three days and are strongest during the first week overall. The average duration is 3 to 4 weeks. Common symptoms include irritability, difficulty concentrating, increased appetite, and strong cravings. While not dangerous, nicotine withdrawal can be intensely uncomfortable in those first few days, which is why the majority of quit attempts fail in the first week.
Cannabis Withdrawal
Cannabis withdrawal is real, though it only occurs after heavy, long-term use. Symptoms usually begin within 24 to 48 hours of stopping and peak by day three. Most symptoms clear within about five days, though some can linger for two to three weeks in people who used very frequently. Irritability, sleep disruption, decreased appetite, and restlessness are the most common complaints.
Stimulant Withdrawal
Withdrawal from stimulants like cocaine, amphetamines, and methamphetamine follows a different pattern than most other substances. The initial phase is a “crash” marked by extreme fatigue. You may sleep for most of the day for 2 to 4 days. The acute physical withdrawal period lasts roughly 1 to 2 weeks.
The harder part of stimulant withdrawal is psychological. Depression, anxiety, low motivation, low energy, and intense cravings can persist for weeks to months after the physical symptoms end. This extended psychological recovery is a major driver of relapse with stimulants.
Antidepressant Discontinuation
Stopping antidepressants (particularly SSRIs) can cause discontinuation syndrome, which isn’t the same as addiction withdrawal but shares some overlap. Symptoms typically begin 2 to 4 days after stopping and last less than two months in most cases. The most common effects include dizziness, “brain zaps” (brief electrical shock sensations), nausea, irritability, and vivid dreams.
Most cases are mild and resolve within eight weeks. But a small percentage of people experience longer symptoms: about 7% still have symptoms at two months, 6% at one year, and 2% beyond three years. Tapering off gradually rather than stopping abruptly significantly reduces the risk.
Why Timelines Vary So Much
Several factors push your personal timeline shorter or longer than the averages listed above. The most important is which substance you used and its half-life, meaning how quickly your body clears it. Short-acting substances cause withdrawal that hits fast and ends sooner. Long-acting substances produce a slower, more drawn-out process.
How long you used the substance matters too. Chronic use causes changes to brain chemistry at the molecular and cellular level that take longer to reverse. Higher doses, longer duration of use, and using multiple substances simultaneously all tend to extend withdrawal. Individual differences in metabolism, age, overall health, and genetics also play a role, which is why two people withdrawing from the same substance on the same timeline can have very different experiences.
Post-Acute Withdrawal Syndrome
After the acute phase ends, some people enter a longer period of lingering symptoms known as post-acute withdrawal syndrome, or PAWS. This has been described after withdrawal from alcohol, benzodiazepines, opioids, cannabis, stimulants, nicotine, and even caffeine. The symptoms are primarily psychological and mood-related: anxiety, depression, irritability, sleep problems, difficulty with memory and concentration, and general emotional instability.
PAWS symptoms tend to fluctuate, coming in waves rather than being constant. They can last weeks, months, or in some cases years after the acute withdrawal period. This is the phase that catches many people off guard because they expect to feel normal once the physical symptoms pass. Understanding that recovery can be a longer process helps set realistic expectations and reduces the risk of relapse during a difficult stretch.