This is the hub page for understanding opioid withdrawal timing — every substance-specific and symptom-specific page on this site links back here, and this page links out to all of them.
The single most important thing to understand first
There is no one universal opioid withdrawal timeline. The single biggest factor is which opioid, and specifically how long-acting it is. A timeline built around heroin will be wrong for methadone by weeks. This page gives you the general shape; use our substance-specific pages for the version that actually applies to you. [Links to fentanyl, heroin, oxycodone, hydrocodone, methadone, and buprenorphine withdrawal articles]
The general shape, for short-acting opioids (heroin, oxycodone, hydrocodone, fentanyl)
- 6–12 hours after last use: early symptoms begin — anxiety, muscle aches, yawning, sweating [links to each symptom article]
- 24–72 hours: peak symptoms — nausea, vomiting, diarrhea, insomnia, strong cravings
- 5–7 days: acute physical symptoms substantially resolve
- Weeks to months: psychological and some physical symptoms can persist as post-acute withdrawal syndrome (PAWS) [link]
The general shape, for long-acting opioids (methadone, some buprenorphine discontinuation)
- 24–48 hours: later onset than short-acting opioids
- Days 3–8: peak, often more prolonged than short-acting withdrawal
- 2–3 weeks or longer: acute symptoms gradually resolve
- Months: protracted symptoms can last longer than with shorter-acting opioids
What actually determines your specific timeline
- Which opioid, and its half-life specifically [substance-specific links]
- Total duration and intensity of use
- Whether you taper or stop abruptly [link to tapering article]
- Individual physiology, general health, and body composition
- Whether other substances (alcohol, benzodiazepines) are also involved — this changes both timeline and medical risk significantly [link to polysubstance withdrawal articles]
The fact that matters more than the exact days
Regardless of which timeline applies to you, tolerance drops during this process — often within days — which makes returning to a previous dose significantly more dangerous than before withdrawal began. [tolerance article] overdose risk after a break tool This single fact causes more deaths than withdrawal itself ever does.
Your real options here
- Ride it out unsupported — possible for some people, but carries real risks this page’s linked articles cover honestly [link to “cold turkey at home” article]
- Medication for opioid use disorder — can stop this entire timeline rather than waiting through it [link to MAT comparison tool]
- Supervised detox — medical support through the acute phase, though detox alone (without follow-up medication) is associated with elevated overdose risk afterward [link to “detox is not treatment” article]
Medically reviewed by [pending]. Sources: SAMHSA TIP 63, ASAM National Practice Guideline.