How Long Does Withdrawal Last?

A Complete Timeline by Substance

Withdrawal does not last forever—but knowing what to expect can make the difference between pushing through and giving up. Whether you’re supporting a loved one or going through the process yourself, understanding the timeline helps you prepare for what’s ahead.

This guide covers the biological basics of withdrawal, why timelines vary so widely, what to expect from each major substance type, and when the situation requires immediate medical attention.

Medical disclaimer: This article is for informational purposes only and does not constitute medical advice. Always consult a qualified healthcare professional before making any decisions related to withdrawal or detoxification.

What Actually Happens During Withdrawal

Withdrawal occurs when someone who has developed a physical dependence on a substance reduces or stops use. The brain—having adapted to the constant presence of that substance—struggles to regulate itself without it.

Different substances disrupt different neurochemical systems. Alcohol and benzodiazepines, for example, suppress GABA (the brain’s primary inhibitory chemical) while suppressing glutamate activity. When use stops abruptly, the brain swings into a hyperexcitable state. Opioids disrupt the endorphin system. Stimulants crash dopamine and norepinephrine pathways.

The result in each case is a set of physical and psychological symptoms that reflect the brain’s attempt to recalibrate.

Physical dependence—not just addiction—is required for withdrawal to occur. Someone who uses a substance sporadically is unlikely to experience significant withdrawal. Regular, consistent use over weeks, months, or years is typically what creates the neurological changes that make withdrawal both possible and challenging.

What Determines How Long Withdrawal Lasts

No two withdrawal experiences are identical. Several variables interact to shape duration and severity:

Type of substance: Short-acting drugs leave the body faster, triggering earlier but often briefer withdrawal. Long-acting drugs produce delayed but more drawn-out symptoms.
Duration of use: Longer periods of use generally produce more entrenched neurological changes, extending recovery timelines.
Dosage and frequency: High-dose, frequent use increases the severity of dependence—and, in turn, withdrawal.
Method of administration: Smoking or injecting a substance typically produces stronger dependence faster than oral use.
Individual biology: Age, liver function, metabolism, genetics, and body composition all influence how quickly a substance clears and how the body responds.
Co-occurring health conditions: Mental health disorders, chronic illness, or simultaneous use of multiple substances complicate and often prolong withdrawal.
History of previous withdrawals: A phenomenon known as “kindling” means that repeated withdrawals from alcohol and benzodiazepines can actually become more severe over time.

Acute Withdrawal vs. Post-Acute Withdrawal Syndrome (PAWS)

Understanding the two phases of withdrawal is essential.

Acute Withdrawal

Acute withdrawal refers to the initial period of symptoms that emerge directly after stopping or significantly reducing substance use. This phase is when physical symptoms are most intense—tremors, nausea, sweating, heart rate changes, and in severe cases, seizures or hallucinations. Acute withdrawal is time-limited for most substances, typically resolving within a matter of days to a few weeks.

Post-Acute Withdrawal Syndrome (PAWS)

PAWS describes the more prolonged, lower-grade symptoms that persist after acute withdrawal has resolved. These are predominantly psychological and neurological: anxiety, depression, mood swings, sleep disturbance, cognitive difficulties, fatigue, and cravings.

PAWS is not yet a formal diagnosis in the DSM (Diagnostic and Statistical Manual of Mental Disorders), but it is widely recognized in clinical practice. The SAMHSA (Substance Abuse and Mental Health Services Administration) has documented protracted withdrawal as a significant barrier to sustained recovery.

PAWS is common among people recovering from alcohol, opioids, benzodiazepines, and stimulants. Symptoms can fluctuate—they may improve for weeks and then suddenly resurface, particularly during periods of stress. This unpredictability makes PAWS a leading driver of relapse.

Duration varies significantly by substance, but PAWS can persist for months. In some cases—particularly with benzodiazepines—symptoms may linger for a year or longer.

Withdrawal Timelines by Substance

Alcohol

Alcohol withdrawal moves quickly and can escalate to life-threatening severity within 72 hours. It should never be managed alone.

Timeline:

Within 6–12 hours: Mild symptoms begin, even sometimes while blood alcohol levels are still measurable. These include headache, anxiety, tremors, insomnia, sweating, nausea, and heart palpitations.
12–24 hours: Alcoholic hallucinosis may develop—visual, auditory, or tactile hallucinations that occur with a clear sensorium.
24–48 hours: Seizure risk is highest during this window. Seizures can occur without warning and require immediate medical attention.
48–72 hours: Delirium tremens (DTs) may emerge. This severe form of alcohol withdrawal is characterized by profound disorientation, agitation, fever, rapid heart rate, high blood pressure, and hallucinations. The mortality rate for untreated DTs is estimated at around 15%; with proper medical treatment, this drops to approximately 1–4%.
After 72 hours: Symptoms typically begin to improve, gradually resolving over the following 4–7 days.

A survey of 1,559 adults who had detoxed from alcohol found that withdrawal symptoms lasted an average of 4.83 days, with 95% of respondents experiencing symptoms lasting between two and eight days.

PAWS: Alcohol-related PAWS can include anxiety, depression, mood instability, sleep disruption, fatigue, and difficulty concentrating. These symptoms may persist for months—and in some cases, several years—after the last drink.

Heavy drinkers face significantly elevated risks. According to data from The Recovery Village, heavy drinkers are 90% more likely to experience DTs and 45% more likely to have seizures compared to non-heavy drinkers during detoxification.

Key risk factors for severe alcohol withdrawal: heavy daily consumption, older age, previous DTs or withdrawal seizures, impaired liver function, and other medical conditions.

Opioids

Opioid withdrawal is rarely life-threatening in healthy adults, but the intensity of symptoms—often described as severe flu combined with profound psychological distress—is a major driver of relapse.

The timeline depends heavily on whether the opioid is short-acting or long-acting.

Short-acting opioids (e.g., heroin, oxycodone, hydrocodone):

Onset: Within 8–24 hours of last use
Peak: 36–72 hours
Duration: 5–10 days for acute symptoms

Long-acting opioids (e.g., methadone, extended-release formulations):

Onset: As late as 36–48 hours after last dose
Peak: Around day 3–4, sometimes later
Duration: Acute symptoms can persist for up to 14–21 days

Symptoms during acute opioid withdrawal include:

Early: Yawning, runny nose, watery eyes, sweating, anxiety, insomnia, mild muscle aches
Peak: Severe muscle and bone pain, nausea, vomiting, diarrhea, abdominal cramping, dilated pupils, elevated heart rate and blood pressure, agitation, intense cravings

PAWS: Opioid-related PAWS symptoms—depression, anxiety, emotional numbness, low energy, poor sleep, and impaired concentration—may persist for 6–9 months or longer after cessation. These symptoms are a significant relapse trigger.

Medication-Assisted Treatment (MAT) using FDA-approved medications like buprenorphine, methadone, and naltrexone is widely recognized as an effective approach for managing opioid withdrawal and reducing PAWS severity. The WHO’s Clinical Guidelines for Withdrawal Management support MAT as a first-line option.

Benzodiazepines

Benzodiazepine withdrawal is among the most medically complex and potentially dangerous of all withdrawal syndromes. Like alcohol, benzos affect GABA receptors—making abrupt cessation potentially fatal in dependent individuals.

Timelines vary based on the half-life of the specific drug.

Short-acting benzos (e.g., Xanax/alprazolam, Ativan/lorazepam):

Onset: Within hours of the last dose
Peak: Around day 2
Acute duration: Symptoms often begin resolving by days 4–5, though full acute withdrawal may last 5–28 days

Long-acting benzos (e.g., Valium/diazepam, Klonopin/clonazepam):

Onset: May not appear until a week after last use
Peak: Second week of abstinence
Acute duration: Up to 4 weeks to significantly reduce

Acute withdrawal symptoms can include anxiety, panic attacks, tremors, sweating, hyperventilation, muscle spasms, insomnia, hypersensitivity to light and sound, hallucinations, delirium, and seizures.

Stopping benzodiazepines cold turkey after significant dependence can result in seizures, severe confusion, and death. Medically supervised tapering—often using a longer-acting benzodiazepine like diazepam—is the recommended standard of care. The WHO strongly recommends against abrupt discontinuation.

PAWS: Between 10–25% of chronic benzodiazepine users experience protracted withdrawal after acute symptoms resolve. Symptoms typically include worsening anxiety and depression, insomnia, cognitive difficulties, sensory disturbances, and gastrointestinal problems. Protracted benzo withdrawal generally resolves within 6–18 months for most people, though a minority report symptoms persisting for several years. A 2020 FDA Drug Safety Communication acknowledged that withdrawal duration varied “from weeks to years.”

Using benzodiazepines for as little as 3–6 weeks can produce dependence, and research suggests around 40% of people who use them for 6 months or longer experience moderate to severe withdrawal upon stopping.

Stimulants

Stimulant withdrawal—from cocaine, methamphetamine, and amphetamines—differs from the above categories. It is predominantly psychological rather than physical, and does not typically produce the life-threatening cardiovascular instability of alcohol or benzo withdrawal. However, the psychological intensity—especially severe depression and suicidal ideation—can still be dangerous.

Timeline:

Onset: Within hours to 24 hours of last use (crack cocaine withdrawal may begin within an hour)
Acute withdrawal (“crash”): Characterized by intense fatigue, dysphoria, depression (sometimes with suicidal thoughts), increased sleep and appetite, low energy, irritability, and powerful cravings. Duration: approximately 1–2 weeks
Post-acute phase: Exhaustion, excessive sleep, extreme mood swings, continued cravings. This may last 2 weeks or more after last use.

PAWS: Prolonged stimulant withdrawal can involve persistent fatigue, anhedonia (inability to feel pleasure), low impulse control, anxiety, mood instability, and reduced cognitive function. These symptoms can last a month or more—and in some cases, months beyond that.

There are currently no FDA-approved medications specifically for stimulant withdrawal, though antidepressants and other supportive medications may be used to manage individual symptoms.

Common Withdrawal Symptoms Across Substances

While timelines differ, several symptoms appear across most substance withdrawal syndromes:

Anxiety and agitation
Sleep disturbances (insomnia or hypersomnia)
Mood changes and depression
Fatigue and low energy
Nausea, vomiting, or gastrointestinal upset
Sweating and temperature dysregulation
Cravings for the substance
Difficulty concentrating

The specific profile and intensity vary considerably by substance and individual.

Approaches to Managing Withdrawal

Medical Supervision

Professional detoxification is considered the gold standard for managing withdrawal from alcohol, benzodiazepines, and opioids. Medical oversight allows for:

Monitoring of vital signs and symptom progression
Medication management to reduce severity
Rapid response to life-threatening complications

For alcohol and benzo withdrawal, medically supervised inpatient detox is strongly recommended for anyone with a history of severe withdrawal, seizures, or DTs—or those using high doses over a long period.

Medications

Several medications reduce withdrawal severity and duration:

Alcohol/benzodiazepines: Benzodiazepines (e.g., diazepam, chlordiazepoxide) are used to manage acute symptoms and prevent seizures. Anticonvulsants, beta-blockers, and alpha-agonists may also be used.
Opioids: Buprenorphine and methadone ease withdrawal and reduce cravings. Clonidine may address specific symptoms like sweating and elevated blood pressure.
Stimulants: No approved medications; symptom-specific support (e.g., antidepressants for depression) may be prescribed.

Medication-assisted treatment does not typically shorten the total withdrawal period, but it significantly reduces its intensity and the associated risks.

Psychological Support

Cognitive behavioral therapy (CBT), motivational interviewing (MI), and contingency management (CM) have the strongest evidence base for supporting long-term recovery. These approaches help address the psychological symptoms of PAWS and reduce relapse risk after detox is complete.

Support groups—including 12-step programs and alternatives like SMART Recovery—provide community reinforcement, which research consistently links to better outcomes.

Lifestyle Factors

For those managing PAWS, lifestyle plays a measurable role in recovery:

Sleep hygiene: Consistent sleep schedules support neurological repair
Physical activity: Regular exercise improves mood, reduces anxiety, and supports dopamine regulation
Nutrition: Adequate nutrition aids in restoring brain chemistry and reducing fatigue
Stress management: Mindfulness practices have shown early promise in reducing cravings and supporting sobriety

When to Seek Immediate Medical Help

Certain symptoms during withdrawal require emergency intervention. Call emergency services or go to the nearest emergency department immediately if you or someone nearby experiences:

Seizures or convulsions
Hallucinations with confusion or disorientation (possible delirium tremens)
High fever with rapid heart rate and sweating
Chest pain or irregular heartbeat
Loss of consciousness
Severe vomiting leading to dehydration
Suicidal thoughts or self-harm

Do not attempt to manage alcohol or benzodiazepine withdrawal at home without medical guidance. These are the two withdrawal syndromes with the highest risk of fatal complications.

Frequently Asked Questions

How long does withdrawal typically last?

It depends on the substance. Alcohol withdrawal often resolves within 7–10 days, while opioid withdrawal may last 5–21 days depending on the type of opioid. Benzodiazepine withdrawal can persist for 4 weeks or longer in acute form. Post-acute symptoms across substances can last months.

Is withdrawal different the second time?

For alcohol and benzodiazepines, a process called “kindling” means repeated withdrawals can become progressively more severe. Each episode of withdrawal may produce stronger symptoms than the one before.

Can withdrawal kill you?

Withdrawal from alcohol and benzodiazepines can be fatal without proper medical management. Opioid withdrawal is rarely fatal in otherwise healthy adults, though dehydration from vomiting and diarrhea can become serious. Stimulant withdrawal carries risk primarily through severe depression and suicidal ideation rather than physical crisis.

What is PAWS and how long does it last?

Post-Acute Withdrawal Syndrome (PAWS) refers to persistent psychological symptoms—anxiety, depression, sleep problems, cognitive difficulties—that continue after acute withdrawal resolves. Duration varies by substance: alcohol PAWS may last months to years; opioid PAWS typically 6–9 months; benzodiazepine PAWS commonly 6–18 months; stimulant PAWS up to several months.

Does medication-assisted treatment (MAT) shorten withdrawal?

MAT typically reduces the intensity and discomfort of withdrawal rather than its duration. Medications like buprenorphine and methadone help stabilize the nervous system, which can prevent relapse during the most difficult early stages.

Should I detox at home?

For mild cases—and only after consulting a doctor—some outpatient detox is possible. However, anyone with a history of severe withdrawal, seizures, DTs, heavy long-term use of alcohol or benzodiazepines, or multiple substance use should seek medically supervised inpatient care. The risks of unsupervised detox from these substances are substantial.

The Bottom Line: Recovery Takes Time, But It’s Possible

Withdrawal is not a single event—it is a process. For most substances, acute symptoms peak and resolve within days to weeks. The more complex challenge is often PAWS: the extended period of psychological and neurological readjustment that follows.

The most important step anyone can take is not going through it alone. Medical supervision, evidence-based treatment, and ongoing psychological support dramatically improve outcomes—and reduce the risk of complications that make withdrawal dangerous.

If you or someone you know is navigating withdrawal, contact a healthcare professional or reach out to a substance use helpline in your country. Resources like SAMHSA’s treatment locator (findtreatment.gov) in the US, or equivalent national addiction services elsewhere, can help connect you with appropriate care quickly.

Recovery is possible. Starting with the right support makes it more likely.