Withdrawal can last anywhere from a few days to several months, depending on the substance. Acute symptoms from most drugs peak within the first few days and resolve within one to two weeks, but a second phase of subtler symptoms can linger for six months or longer. The timeline varies significantly by substance, how long you used it, your overall health, and how abruptly you stopped.
Alcohol Withdrawal Timeline
Alcohol withdrawal moves fast. Mild symptoms like headache, anxiety, and insomnia typically appear within 6 to 12 hours of your last drink. Within 24 hours, some people experience hallucinations. Seizure risk is highest between 24 and 48 hours, and the most dangerous complication, delirium tremens, can appear between 48 and 72 hours after the last drink.
For most people with mild to moderate withdrawal, symptoms peak between 24 and 72 hours and then begin to resolve. The acute phase is largely over within a week, though sleep problems and anxiety can persist for several weeks. Severe alcohol withdrawal is a medical emergency and one of the few types of withdrawal that can be fatal without treatment.
Opioid Withdrawal Timeline
How long opioid withdrawal lasts depends heavily on which opioid you were using. Short-acting opioids like heroin cause symptoms that start 6 to 12 hours after the last dose and last roughly five days. The worst of it, including muscle aches, nausea, sweating, and intense cravings, hits around days two and three.
Longer-acting opioids like methadone follow a different pattern. Symptoms take longer to appear, sometimes 24 to 48 hours after the last dose, but they also stretch out over a longer period. The acute phase can last two weeks or more. In both cases, sleep disturbances and low mood often continue well beyond the physical symptoms.
Benzodiazepine Withdrawal Timeline
Benzodiazepine withdrawal is notoriously unpredictable. Symptoms that emerge in the first week after stopping the drug tend to merge with more persistent symptoms that can last for many months. Researchers have noted that it is particularly difficult to set precise limits on the duration of protracted benzodiazepine withdrawal.
The acute phase typically begins one to four days after the last dose (longer for slow-acting benzodiazepines) and can include anxiety, insomnia, irritability, and sensory sensitivity. But unlike most other substances, benzodiazepine withdrawal symptoms sometimes fluctuate in waves for months. Gradual tapering under medical guidance significantly reduces the severity and duration of this process. Like alcohol, severe benzodiazepine withdrawal can cause seizures.
Nicotine Withdrawal Timeline
Nicotine withdrawal is shorter and less physically dangerous than withdrawal from alcohol or opioids, but the cravings can be intense. Symptoms peak on the second or third day after quitting and then gradually fade over three to four weeks. Common symptoms include irritability, difficulty concentrating, increased appetite, and restlessness.
The psychological pull of nicotine often outlasts the physical withdrawal. Many people find that situational cravings (after a meal, during stress) persist for months even after the acute symptoms are gone.
Cannabis Withdrawal Timeline
Cannabis withdrawal is real, though it was only recently recognized as a clinical diagnosis. Most symptoms begin within the first one to three days of stopping and are largely gone within two weeks. Irritability, appetite changes, and anxiety tend to resolve first. Sleep disturbances are the exception. Research published in the American Journal of Psychiatry found that difficulty sleeping and vivid or strange dreams remained elevated throughout a 45-day study period, long after other symptoms had returned to baseline.
Antidepressant Discontinuation
Stopping an antidepressant, particularly an SSRI or SNRI, can cause a distinct set of withdrawal-like symptoms sometimes called discontinuation syndrome. Symptoms typically begin two to four days after stopping the medication and include dizziness, nausea, flu-like feelings, insomnia, and electric shock sensations in the head (commonly called “brain zaps”).
For most people, these symptoms last less than two months. But the experience is not uniform. One study found that 7% of people still had symptoms at the two-month mark, 6% at one year, and 2% beyond three years. Your risk goes up if you quit abruptly rather than tapering slowly, took a high dose, or used the medication for years. Antidepressants that your body metabolizes quickly are more likely to cause discontinuation symptoms than those that stay in your system longer.
Post-Acute Withdrawal Syndrome (PAWS)
Once the acute phase of withdrawal ends, many people assume the hard part is over. But a second, longer phase of symptoms can follow. Post-acute withdrawal syndrome, or PAWS, results from the brain readjusting to functioning without the substance. It can occur after dependence on alcohol, opioids, benzodiazepines, or stimulants.
PAWS symptoms are different from acute withdrawal. They are more cognitive and emotional than physical:
- Difficulty thinking clearly or concentrating
- Memory problems
- Emotional overreactions or feeling emotionally numb
- Sleep disturbances
- Physical coordination problems
- Heightened sensitivity to stress
These symptoms tend to come and go in waves rather than staying constant, which can be confusing and discouraging. Recovery from PAWS typically takes somewhere between 6 and 24 months. The unpredictable timing of symptom flare-ups is one of the biggest challenges to maintaining sobriety during this period, because people often don’t realize what they’re experiencing is a normal part of recovery.
What Affects How Long Your Withdrawal Lasts
Two people quitting the same substance can have very different withdrawal experiences. Several factors influence the duration and severity of your symptoms: the specific substance, how long you used it, your age, your physical health (especially liver function, since that’s where most drugs are broken down), your mental and emotional state going in, and whether you taper gradually or stop all at once.
Heavier, longer use generally produces longer withdrawal. Someone who drank heavily for a decade will typically face a more extended recovery than someone who developed a problem over six months. The same principle applies across substances. Your body needs time to recalibrate systems that adapted to the constant presence of a drug, and the deeper those adaptations, the longer the recalibration takes.