How Long Does Opioid Withdrawal Last

How long opioid withdrawal lasts with short-acting pills, heroin, and fentanyl, why timelines differ, and how medications like buprenorphine ease the process.

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Key takeaway

Acute opioid withdrawal often peaks within a few days for short-acting opioids and can last longer after fentanyl. Medications for opioid use disorder shorten suffering and cut overdose risk. Call or text (800) 653-9376 for MOUD access.

Last updated: Wed Oct 07 2026 00:00:00 GMT+0000 (Coordinated Universal Time)

People ask for a clock. Biology gives a range.

Call 911 for overdose. Call or text 988 for a crisis.

Typical acute window

For many short-acting prescription opioids, symptoms start within a day, peak over several days, and ease across about a week. Heroin follows a similar pattern. Methadone withdrawal starts later and lasts longer.

Fentanyl changes the plan

Illicit fentanyl can prolong discomfort and complicate buprenorphine induction. Clinics use timed starts or low-dose approaches when appropriate. Related: opioid withdrawal timeline, fentanyl withdrawal symptoms.

After the acute phase

Insomnia, anxiety, and craving can continue. That is when people relapse without MOUD and counseling support.

Broker filter

Any guarantee of "withdrawal done in 72 hours, cured" without medication options is marketing.

Next step

Call or text (800) 653-9376 to find same-week MOUD rather than waiting out peak symptoms alone.

Additional Resources

Sources cited on this page:

Common Questions

How long does opioid withdrawal last?

Many acute symptoms peak in 2 to 4 days for short-acting opioids and ease over a week or so. Fentanyl and long-acting opioids can stretch the timeline. Sleep and mood symptoms may linger.

Does fentanyl withdrawal last longer?

Often yes, and induction onto buprenorphine may need careful timing. See fentanyl withdrawal symptoms.

Will withdrawal kill me?

Opioid withdrawal is rarely fatal alone, but dehydration, medical comorbidity, and relapse to a stronger supply can be.

What shortens withdrawal?

Buprenorphine or methadone, hydration, and clinical monitoring. Comfort meds alone are not a full plan.

Where can I get help now?

Call or text (800) 653-9376, search FindTreatment.gov, or call 988 in a crisis.