How Long Does Detox Take? Timeline by Substance

The Short Answer

Medical detox typically takes between 3 and 10 days for most substances. But the exact duration depends heavily on which substance is involved, how long and how heavily a person has been using, their overall health, and whether multiple substances are present. Some detox processes — particularly benzodiazepine withdrawal — can take significantly longer under medical management.

Understanding what to expect helps people prepare mentally and practically. Below is a breakdown by substance.

Alcohol Detox: 3 to 7 Days

Alcohol withdrawal is one of the most medically serious detox processes. Symptoms typically begin 6 to 24 hours after the last drink and can escalate to life-threatening complications — including seizures and delirium tremens (DTs) — without medical supervision.

• 6–24 hours: Tremors, anxiety, sweating, nausea, elevated heart rate
• 24–48 hours: Risk of withdrawal seizures peaks; symptoms intensify
• 48–72 hours: Delirium tremens may develop in severe cases — confusion, fever, hallucinations, cardiovascular instability
• Days 4–7: Acute symptoms resolve for most people with medical management

Benzodiazepines (primarily diazepam or lorazepam) are the standard medication for managing alcohol withdrawal. Medical supervision is essential for anyone with a history of heavy or daily alcohol use.

Opioid Detox: 5 to 10 Days

Opioid withdrawal timelines vary by the specific opioid:

• Short-acting opioids (heroin, oxycodone, hydrocodone): Withdrawal begins within 6–12 hours, peaks at 36–72 hours, and acute symptoms resolve within 5–7 days
• Long-acting opioids (methadone, extended-release oxycodone): Withdrawal onset is delayed — often 24–48 hours — and the process extends longer, sometimes 10–20 days for the acute phase
• Fentanyl: Because of its high potency and tight receptor binding, fentanyl withdrawal can be particularly intense and may have a less predictable timeline than heroin or prescription opioids

Medical opioid detox typically uses buprenorphine (Suboxone) or methadone to manage symptoms, followed by a taper. Most people complete the acute phase within 7–10 days.

Benzodiazepine Detox: 1 to 4 Weeks

Benzodiazepine (benzo) withdrawal is medically serious and can be fatal without proper management. Unlike opioid withdrawal, which is typically time-limited, benzo withdrawal can be prolonged and unpredictable.

• Short-acting benzos (Xanax, Ativan): Withdrawal begins within 1–2 days of the last dose; peaks around days 3–5
• Long-acting benzos (Valium, Klonopin): Withdrawal onset may be delayed by several days; the acute phase can extend 2–4 weeks

Medical benzo detox uses a gradual taper — often substituting a longer-acting benzodiazepine to reduce severity — over the course of several weeks. Attempting to stop benzodiazepines abruptly without medical supervision carries a real risk of seizures and should never be done independently.

Methamphetamine Detox: 1 to 2 Weeks

Meth withdrawal is primarily psychological rather than physically dangerous. The acute phase typically lasts 7–14 days:

• Days 1–3: The “crash” — extreme fatigue, depression, hypersomnia
• Days 4–10: Cravings, mood instability, cognitive impairment, anxiety
• Days 10–14+: Gradual improvement; residual depression and cravings may persist for weeks

No FDA-approved medication exists specifically for meth withdrawal. Supportive care — sleep management, nutrition, counseling, and a structured environment — drives outcomes in meth detox.

Cocaine and Stimulant Detox: 1 to 2 Weeks

Cocaine withdrawal follows a pattern similar to methamphetamine, with the “crash” period in the first 1–3 days followed by a longer period of depression, fatigue, and cravings. The physical symptoms are generally less severe than opioid or alcohol withdrawal, but the psychological distress and cravings drive relapse risk.

What Factors Affect How Long Detox Takes?

Several variables influence how long an individual’s detox process will take:

• Duration and intensity of use: Longer, heavier use typically means a more prolonged withdrawal
• Polysubstance use: Using multiple substances simultaneously complicates and often extends detox
• Age and overall health: Older individuals or those with compromised liver or kidney function may metabolize substances more slowly
• Prior withdrawal history: Kindling — the phenomenon where each successive withdrawal becomes more severe — can extend and intensify the process
• Mental health: Co-occurring anxiety, depression, or PTSD can complicate and prolong withdrawal
• Medications used: The type and dose of medications administered during detox affect the timeline

Detox Is Not Treatment

It’s important to understand that completing detox is not the same as completing addiction treatment. Detox addresses physical dependence — clearing the substance and managing withdrawal. The underlying behavioral, psychological, and social factors that drive addiction require ongoing treatment beyond detox.

Research consistently shows that people who transition directly from detox into a residential or outpatient treatment program have significantly better long-term outcomes than those who complete detox alone. The days and weeks immediately following detox are among the highest-risk periods for relapse.

Getting Help in Georgia

If you have questions about the detox process for yourself or a loved one — what to expect, how long it will take, or what level of care is appropriate — a free assessment from a licensed treatment specialist can provide personalized answers. Call any time; assessments are confidential and carry no obligation.