Detox timelines vary widely depending on the substance, but most acute physical withdrawal resolves within one to two weeks. Alcohol withdrawal typically peaks between 24 and 72 hours. Opioid withdrawal peaks around days 2 to 3 and clears within a week. Stimulant withdrawal can stretch for weeks, and benzodiazepine detox may take months when tapered gradually. Beyond the acute phase, lingering psychological symptoms can persist for months or even longer.
Alcohol: 2 to 7 Days for Most People
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. For most people with mild to moderate withdrawal, symptoms peak between 24 and 72 hours and then start improving.
The serious complications happen in that same window. Seizure risk is highest 24 to 48 hours after the last drink. Delirium tremens, the most dangerous form of withdrawal, can appear between 48 and 72 hours. This is why alcohol is one of the few substances where withdrawal itself can be life-threatening. Most people feel substantially better within 5 to 7 days, though sleep disruption and anxiety often linger longer.
Not everyone can safely detox at home. If you’ve had a complicated withdrawal episode in the past year, have other medical or psychiatric conditions, or lack a supportive environment, inpatient supervision is significantly safer. People with mild withdrawal and stable health can often be managed in an outpatient setting with regular check-ins.
Opioids: 5 to 7 Days for Short-Acting, Longer for Methadone
If you’re withdrawing from a fast-acting opioid like heroin or oxycodone, symptoms usually start 6 to 12 hours after your last dose. They peak around days 2 to 3 and generally resolve within 5 to 7 days. The experience is intensely uncomfortable (muscle aches, nausea, sweating, insomnia, restlessness) but rarely medically dangerous on its own.
Longer-acting opioids like methadone follow a slower pattern. Withdrawal symptoms may not appear until 1 to 3 days after the last dose. They’re typically less intense than short-acting opioid withdrawal but can stretch on for several weeks. This extended timeline is one reason tapering under medical guidance is often preferred over stopping abruptly.
Benzodiazepines: Weeks to Months
Benzodiazepine detox is one of the longest and most unpredictable timelines. Like alcohol, benzodiazepine withdrawal can cause seizures, which makes it medically serious. The duration depends heavily on which drug you’re taking and how long you’ve been on it.
Short-acting benzodiazepines (like alprazolam) cause withdrawal symptoms that come on quickly and intensely. Long-acting ones (like diazepam) produce a slower, more gradual withdrawal. Doctors often switch patients from a short-acting to a long-acting benzodiazepine before beginning a taper, because the smoother onset of withdrawal symptoms makes the process more tolerable. A gradual taper can take weeks to several months, depending on your dose and how long you’ve been using the medication. Stopping abruptly after long-term use is dangerous and not recommended.
Stimulants: Days of Crashing, Weeks of Recovery
Withdrawal from stimulants like methamphetamine and cocaine looks different from alcohol or opioid withdrawal. The physical danger is low, but the psychological toll is heavy. The initial “crash” phase hits hard: you may sleep for most of the day for 2 to 4 days as your body recovers from the stimulant’s effects.
After the crash, the harder part begins. Depression, anxiety, low motivation, and a flat inability to feel pleasure can persist for weeks or months. These emotional symptoms are what drive most relapses, and they’re a normal part of the brain recalibrating after prolonged stimulant use. The total withdrawal window ranges from a few days to a few weeks for acute symptoms, but the psychological recovery extends well beyond that.
Caffeine: 2 to 9 Days
Caffeine withdrawal is real and recognized, even if it’s far less dangerous. Symptoms typically begin 12 to 24 hours after your last cup of coffee, peak between 24 and 51 hours, and last anywhere from 2 to 9 days. The hallmark is a throbbing headache, often accompanied by fatigue, irritability, and difficulty concentrating. Tapering gradually (cutting your intake by a cup every few days) can minimize the headache significantly.
What Affects Your Personal Timeline
These ranges are averages, and several factors push your experience toward the shorter or longer end. The most important ones are how long you’ve been using the substance, how much you typically use, and whether you’re dependent on more than one substance at a time. Someone who drank heavily for two decades will generally have a rougher, longer withdrawal than someone who drank heavily for six months.
Your liver and kidneys do the heavy lifting of clearing substances from your body. The liver processes drugs during their first pass through the bloodstream after absorption. Some compounds are almost entirely removed in a single pass, while others barely register. How efficiently your liver handles this depends on age, overall health, genetics, and whether the organ has been damaged by long-term substance use. Kidney filtration rate also matters. Healthy young adults filter about 80 to 120 milliliters of blood per minute through their kidneys, but this rate declines with age and kidney disease, slowing the clearance of water-soluble drugs and their byproducts.
Post-Acute Withdrawal: The Longer Timeline
Many people clear acute withdrawal in a week or two and assume detox is over, only to be blindsided by a second wave. Post-acute withdrawal syndrome (PAWS) refers to psychological and mood-related symptoms that persist for months, and in some cases, years after the acute phase ends. These include anxiety, depression, irritability, sleep problems, and difficulty with memory and concentration.
PAWS is most well-documented after withdrawal from alcohol, opioids, and benzodiazepines, though it has been reported with stimulants, cannabis, nicotine, and even caffeine. The symptoms tend to fluctuate, coming in waves rather than staying constant. A person might feel fine for two weeks and then hit a rough patch for several days. This unpredictable pattern gradually smooths out over time, but understanding that it’s a normal part of recovery helps prevent the discouragement that often leads to relapse.
The key distinction is that acute detox is a finite physical process with a clear end point. PAWS is the brain’s slower recalibration, and its timeline is measured in months rather than days.