Opioid withdrawal symptoms and timeline
Two people stopping the same dose on the same day can have completely different weeks. What decides it is which opioid, how long, and whether fentanyl is in the picture.
Two Georgia locations
Woodstock, GA 30188
Hiram, GA 30141
Saturday–Sunday 9:00 AM – 12:00 PM
Opioid withdrawal typically begins 6 to 24 hours after the last dose, peaks within 72 hours, and largely resolves within five to seven days for short-acting opioids. Symptoms include muscle and bone pain, cramping, nausea, vomiting, diarrhea, sweating, insomnia and severe restlessness. Severity is measured clinically using the COWS score, which also determines when buprenorphine can safely be started.
How severity is actually measured
The COWS score, and why it matters to you
Opioid withdrawal is not assessed by asking how bad you feel. It is scored, using the Clinical Opiate Withdrawal Scale — pulse, sweating, restlessness, pupil size, joint and bone aching, runny nose or watering eyes, GI upset, tremor, yawning, anxiety and gooseflesh.
Two things follow from that score. It sets your comfort medication doses, and more importantly it determines when buprenorphine can safely be started.
That second point is why the score matters to you rather than only to a clinician. Buprenorphine started too early triggers precipitated withdrawal — abrupt and far worse than what you already had. Scoring is how that gets avoided, and it is genuinely hard to do for yourself when you feel that bad.
Timeline
How opioid withdrawal progresses
This is short-acting opioids. The variation between opioids is substantial.
| Opioid | Onset | Peak | Duration |
|---|---|---|---|
| Heroin | 6–12 hours | 24–72 hours | 5–7 days |
| Oxycodone / hydrocodone | 8–12 hours | Days 2–3 | 5–7 days |
| Extended-release opioids | 12–24 hours | Days 2–4 | 7–10 days |
| Fentanyl | 8–24 hours | Days 2–4 | 7–10 days, in waves |
| Methadone | 24–48 hours | Days 3–6 | Weeks |
| Buprenorphine | 24–72 hours | Days 3–5 | Weeks |
Substance-specific: heroin, fentanyl, opiate withdrawal.
Symptoms
What the score is actually measuring
Bone and muscle pain
Deep aching through limbs and back. Consistently the symptom people rate worst and the one that ends most unsupervised attempts.
Restlessness
An inability to stay still, worst at night. Combines with insomnia to make the peak genuinely unbearable.
Gastrointestinal
Nausea, vomiting, diarrhea and cramping. Dehydration here is the most common medical complication.
Autonomic
Sweating, chills, gooseflesh, runny nose, watering eyes, dilated pupils, raised pulse.
Insomnia
Frequently total for the first two or three nights, compounding everything else.
Anxiety and irritability
Present throughout and often disproportionate. Hard on the people around you.
The tolerance drop is the actual danger
Opioid withdrawal is severe and almost never fatal. What is fatal is what happens next. Within days of stopping, tolerance falls sharply — and a dose that was routine last month can stop your breathing.
Most opioid deaths following abstinence happen this way: after detox, after jail, after a hospital stay. That is not an argument against detoxing. It is an argument for finishing with ongoing treatment rather than a handshake, and for keeping naloxone where the people you live with can find it.
Getting help
Day two is where this comes apart without help
Buprenorphine timed against your COWS score, plus comfort medication through the peak. Our clinics in Woodstock and Hiram run to 7:00 PM on weekdays and open Saturday and Sunday mornings.
Related
Other withdrawal guides
Common questions
Opioid withdrawal, answered
What is the COWS score?
The Clinical Opiate Withdrawal Scale — a scoring tool measuring pulse, sweating, restlessness, pupil size, aching, GI upset, tremor, yawning, anxiety and gooseflesh. It determines medication doses and, critically, when buprenorphine can safely be started.
How long does opioid withdrawal last?
Five to seven days for short-acting opioids. Extended-release formulations run longer, methadone considerably longer, and fentanyl arrives in waves because it stores in tissue.
Is opioid withdrawal dangerous?
Rarely fatal directly. The genuine dangers are dehydration during the peak and the sharp fall in tolerance afterward, which makes relapse potentially lethal.
Why is my withdrawal worse than someone else's?
Dose, duration, which opioid, and whether it was short or long-acting all change severity considerably. Fentanyl involvement extends and complicates it further.
What is precipitated withdrawal?
Abrupt, severe withdrawal triggered when buprenorphine displaces another opioid from the receptors too soon. Far worse than ordinary withdrawal, and the reason induction timing is scored rather than guessed.
When can I start Suboxone?
Once you are in sufficient withdrawal — typically a COWS score above a defined threshold. That is uncomfortable and it is not optional. With fentanyl the wait is longer and harder to judge.
Do symptoms come in waves?
With short-acting opioids, generally not. With fentanyl they do, because it releases from fatty tissue over days. Symptoms receding then returning strongly suggests fentanyl.
What is post-acute withdrawal?
Sleep disturbance, low energy, flat mood and cravings persisting for weeks after the physical symptoms resolve. This window carries the highest relapse and overdose risk.
Can I die from opioid withdrawal?
Directly, very rarely — though severe dehydration from prolonged vomiting and diarrhea has caused deaths. The far greater risk is overdose after relapse, when tolerance has dropped.
Does everyone need medication?
No, but it changes outcomes substantially. Unmanaged opioid withdrawal is severe enough that most unsupervised attempts end around day two or three.
Woodstock & Hiram, GA
Getting the induction timing right is the whole reason to do this with a clinician.
One conversation tells you whether outpatient detox is a fit, what your insurance covers, and how soon you could start.
678-506-7611
Woodstock ·
Hiram ·
Mon–Fri 7:00 AM – 7:00 PM
Sat–Sun 9:00 AM – 12:00 PM