Detoxing typically takes anywhere from a few days to several weeks, depending on the substance involved. Alcohol withdrawal symptoms peak within 24 to 72 hours and largely resolve within a week for most people, while opioid withdrawal follows a similar arc. But the full picture is more complicated: lingering psychological symptoms can stretch for months after the acute phase ends, and some substances carry longer withdrawal timelines than others.
Alcohol Detox: 3 to 7 Days for Acute Symptoms
Alcohol withdrawal follows a fairly predictable pattern. Mild symptoms like headache, anxiety, and insomnia show up within 6 to 12 hours of your last drink. Within 24 hours, some people experience hallucinations. Symptoms typically peak between 24 and 72 hours, then start improving.
For most people with mild to moderate withdrawal, the worst is over within a week. Medical detox programs for alcohol generally accomplish stabilization within two to three days, occasionally extending to five days when needed. That said, some people deal with lingering insomnia and mood changes for weeks or even months afterward.
The dangerous window to be aware of: delirium tremens, the most severe form of alcohol withdrawal, most often appears 48 to 96 hours after the last drink, though it can surface as late as 7 to 10 days out. Seizure risk is highest between 24 and 48 hours. These complications are why heavy drinkers should not attempt to quit cold turkey without medical supervision.
Opioid Detox: 5 to 7 Days for Short-Acting, Longer for Methadone
The timeline for opioid withdrawal depends on whether you’re coming off a fast-acting or slow-acting opioid. With short-acting opioids like oxycodone or heroin, withdrawal symptoms begin 6 to 12 hours after the last dose, peak around days 2 to 3, and generally resolve within 5 to 7 days.
Slow-release opioids like methadone work differently. Withdrawal symptoms don’t start until 1 to 3 days after your last dose, tend to be less intense, but can drag on for several weeks. This is one reason tapering off methadone is usually done very gradually under medical guidance.
Benzodiazepine Detox: Weeks to Months
Benzodiazepines have one of the longest and most unpredictable withdrawal timelines. Acute withdrawal begins within 1 to 7 days after stopping and lasts roughly 4 to 14 days, with shorter-acting versions (like alprazolam) producing more intense but briefer withdrawal, and longer-acting ones (like diazepam) stretching the process out.
What makes benzodiazepine detox particularly challenging is the protracted withdrawal phase. Anxiety can gradually diminish over an entire year. Insomnia often takes 6 to 12 months to fully resolve. Cognitive impairment, including trouble with memory and concentration, improves gradually but can linger for a year or more, and in some cases doesn’t fully resolve. Sensory symptoms like tingling, numbness, and ringing in the ears can also persist for at least a year. This is why benzodiazepines are almost always tapered slowly rather than stopped abruptly.
Stimulant Detox: A Quick Crash, Then a Long Tail
Stimulants like methamphetamine and cocaine produce a withdrawal pattern that looks different from depressants. The initial “crash” phase involves extreme fatigue, and you may sleep for most of the day for 2 to 4 days. There’s no medically dangerous withdrawal period the way there is with alcohol or benzodiazepines.
The harder part comes after. Intense cravings, depression, difficulty feeling pleasure, and irritability can persist for weeks or months. The physical detox is short, but the psychological recovery is where the real timeline begins.
Nicotine and Caffeine: Days, Not Weeks
Caffeine withdrawal starts 12 to 24 hours after your last cup, peaks between 24 and 51 hours, and generally wraps up within 2 to 9 days. Headaches, fatigue, and irritability are the main symptoms, and while uncomfortable, they’re not dangerous.
Nicotine withdrawal follows a roughly similar arc. Physical symptoms like cravings, restlessness, and difficulty concentrating tend to peak in the first few days and ease substantially within two to four weeks, though cravings can resurface in waves for much longer.
Post-Acute Withdrawal: The Months After Detox
One of the most important things to understand about detox is that the acute phase is only the beginning. Post-acute withdrawal syndrome (PAWS) refers to a cluster of psychological and mood-related symptoms that can persist for months to years after the initial withdrawal period ends. It’s been described after withdrawal from alcohol, benzodiazepines, opioids, marijuana, stimulants, nicotine, and even caffeine.
PAWS symptoms tend to be more psychological than physical: anxiety, depression, sleep problems, difficulty concentrating, and mood swings that come and go in waves. These fluctuations are a major contributing factor for relapse, because people often interpret them as a sign that something is permanently wrong rather than recognizing them as part of a slow recovery process. The symptoms generally diminish over time, but the timeline is unpredictable. Some resolve within weeks, others take months or longer.
What Makes Your Timeline Shorter or Longer
Several factors influence how quickly your body processes and recovers from a substance. The most significant ones are how long you used the substance, how much you used, and which substance it was. But biology plays a real role too.
Age is one of the biggest variables. The liver’s capacity to break down substances through its primary enzyme system drops by 30% or more in older adults, because both liver volume and blood flow decrease with age. That means drugs stay in your system longer and withdrawal can be more prolonged. People with liver disease or advanced heart failure also metabolize substances more slowly.
Genetics matter as well. Variations in the genes controlling your liver enzymes can make you a fast or slow metabolizer of certain substances, which directly affects how long withdrawal lasts. Kidney function is another factor: your kidneys are responsible for filtering and excreting drugs and their byproducts, and any reduction in kidney function slows that clearance down.
Using multiple substances simultaneously tends to complicate and extend the detox process, since your body is managing several withdrawal syndromes at once. And in general, the longer and heavier the use, the longer the recovery.
What Supervised Detox Looks Like
If you’re detoxing from alcohol, opioids, or benzodiazepines, medical supervision significantly improves both safety and comfort. Inpatient medical detox for alcohol typically lasts 2 to 5 days for the acute stabilization phase. When rehabilitation is added, a total inpatient stay of about three weeks is considered standard to get someone to a point where care can continue in an outpatient setting.
For opioids, supervised detox often involves medications that ease withdrawal symptoms and reduce cravings, with the acute inpatient phase lasting roughly a week. Benzodiazepine detox is almost always handled through a gradual tapering schedule that can stretch over weeks or months, because abrupt discontinuation carries seizure risk and produces severe rebound symptoms.
The detox phase, regardless of substance, is the medical stabilization piece. It gets the substance out of your system and manages the physical danger. Long-term recovery from the psychological and behavioral dimensions of addiction is a separate, much longer process.