The opioid withdrawal timeline depends mostly on which opioid you were using. With short-acting opioids like heroin or many prescription painkillers, symptoms usually start within about 8 to 24 hours of the last use, peak over the next few days, and fade within about a week to 10 days. With long-acting opioids like methadone, symptoms start later and can last two weeks or more.
Opioid withdrawal can feel awful, but it is a known medical process with real treatment options. Below, we walk through what to expect at each stage, why the first days are so hard, and how medical care can make withdrawal safer and more bearable.
Why Opioid Withdrawal Happens
When you take opioids regularly, your body adjusts to having them around. Over time, you may need more to get the same effect (tolerance), and your body starts to rely on the drug to feel normal (physical dependence). When you suddenly stop or cut back, your body has to readjust, and that shows up as withdrawal.
According to the National Institute on Drug Abuse, withdrawal can bring muscle aches, abdominal cramps, agitation, anxiety, nausea, vomiting, chills and diarrhea. NIDA also notes that many people keep using opioids mainly to avoid these symptoms. That cycle is one reason withdrawal is such a common turning point, and such a common place to get stuck, for a person with opioid use disorder.
Opioid Withdrawal Timeline: Stage by Stage
Everyone’s experience is different. Your timeline can shift based on the specific drug, how much and how long you used, your overall health, and whether you were also using other substances. These ranges come from national and international clinical guidelines.
Hours 8 to 24: Early Symptoms (Short-Acting Opioids)
For short-acting opioids such as heroin, the World Health Organization’s withdrawal management guidelines put the start of symptoms at about 8 to 24 hours after the last use. MedlinePlus notes that symptoms from heroin usually begin within 12 hours. Early opioid withdrawal symptoms include:
- Anxiety and agitation
- Muscle aches
- Trouble sleeping
- Runny nose and watery eyes
- Sweating
- Frequent yawning
Days 1 to 3: Symptoms Peak
SAMHSA’s treatment guidance describes fully developed withdrawal from short-acting opioids as appearing about 1 to 3 days after the last use. This is usually the hardest stretch. Later-stage symptoms listed by MedlinePlus include stomach cramps, diarrhea, nausea, vomiting, dilated pupils and goosebumps. SAMHSA’s table also lists severe dysphoria (feeling deeply low and uneasy) at this stage, along with dehydration from fluid loss.
Days 4 to 10: Symptoms Ease
For most short-acting opioids, physical symptoms slowly fade. SAMHSA’s guidance lists a total duration of about 7 to 10 days, while the WHO guidelines give a range of 4 to 10 days.
Long-Acting Opioids: A Slower, Longer Timeline
Long-acting opioids like methadone leave the body more slowly, so withdrawal starts later and lasts longer. MedlinePlus says methadone withdrawal usually begins within 30 hours of the last dose, and the WHO puts onset at 12 to 48 hours with a duration of 10 to 20 days. SAMHSA’s guidance notes that fully developed withdrawal may not appear until 72 to 96 hours after the last use and can last 14 days or more.
Is Opioid Withdrawal Dangerous?
MedlinePlus states that withdrawal from opioids is painful but usually not life threatening. That does not mean it is risk-free. Complications can include:
- Dehydration: Ongoing vomiting and diarrhea can cause dehydration and changes in body salts (electrolytes).
- Aspiration: Breathing vomit into the lungs can lead to a lung infection.
- Overdose after withdrawal: This is the biggest danger. Once you go through withdrawal, your tolerance drops. The WHO guidelines warn that people who have withdrawn from opioids are at increased risk of overdose because of that reduced tolerance. Using the amount you used before can be deadly.
Withdrawal from other substances can be more dangerous. Alcohol withdrawal can quickly become life-threatening, and the FDA warns that stopping benzodiazepines abruptly can cause withdrawal reactions, including seizures, which can be life-threatening. If you also drink heavily or take benzodiazepines, do not try to withdraw on your own. You need medical supervision.
If you ever have thoughts of harming yourself during withdrawal, call or text the 988 Suicide & Crisis Lifeline. For a medical emergency, call 911.
How Opioid Withdrawal Is Treated
You do not have to tough it out. Medical care can ease symptoms, lower your risk and help you move into ongoing treatment.
Medications That Ease Withdrawal
MedlinePlus describes several medications used for opioid withdrawal:
- Buprenorphine can treat withdrawal and shorten detox. It is often combined with naloxone, as in Suboxone.
- Methadone relieves withdrawal symptoms and can be used for detox or long-term maintenance.
- Clonidine can reduce anxiety, agitation, muscle aches, sweating, runny nose and cramping.
- Naltrexone may be used later to help prevent relapse.
StatPearls, a peer-reviewed clinical reference, notes that lofexidine was approved by the FDA in 2018 for withdrawal symptoms. Clinicians also use a tool called the Clinical Opioid Withdrawal Scale (COWS), which scores 11 common signs, to judge how severe withdrawal is and when it is safe to start certain medications. Timing matters: starting buprenorphine too soon after the last opioid use can make symptoms worse, which is one reason this should be handled by a medical provider.
Why Detox Alone Is Not Enough
Getting through withdrawal is an important first step, but it is not treatment for opioid use disorder by itself. NIDA explains that methadone, buprenorphine and naltrexone reduce the risk of relapse and overdose death and that behavioral therapy works best alongside medication. You can learn more in our guide to Suboxone for opioid addiction and our overview of medication-assisted treatment.
Where to Go Through Opioid Withdrawal Safely
Where you should be during withdrawal depends on your health, what you have been using and the support around you. Options include:
- Medical detox: Round-the-clock monitoring and medication, often the best fit if withdrawal is expected to be severe or if you also use alcohol or benzodiazepines. Read more in What Is Medical Detox and Do You Need It?
- Outpatient care with medication: Some people can start medication for opioid use disorder with a provider and then join a structured program like a partial hospitalization program (PHP) or intensive outpatient program (IOP).
The Ranch Pennsylvania Outpatient Services does not provide detox on site. If you need medical detox, our team can coordinate it through residential care at The Ranch Pennsylvania before you step down to outpatient treatment.
Withdrawal from specific opioids can look a little different. See our guides to heroin withdrawal and fentanyl withdrawal, or visit our opioid addiction hub for a broader overview.
Frequently Asked Questions
How long does opioid withdrawal last?
For short-acting opioids, physical symptoms usually last about 7 to 10 days. For long-acting opioids like methadone, withdrawal can last 14 days or more.
What day of opioid withdrawal is the worst?
For most short-acting opioids, symptoms are at their worst about 1 to 3 days after the last use. With methadone and other long-acting opioids, the peak comes later, often around days 3 to 4.
Can opioid withdrawal kill you?
Opioid withdrawal is usually not life-threatening on its own, but dehydration and aspiration can be serious. The biggest risk is overdose if you use again after your tolerance has dropped. Keep naloxone on hand and learn how to use Narcan.
Can I detox from opioids at home?
It is safer to go through withdrawal with medical support. A provider can offer medications that ease symptoms and connect you to ongoing care. If you also use alcohol or benzodiazepines, withdrawal must be medically supervised.
Get Help for Opioid Withdrawal in Lancaster, PA
You do not have to face the opioid withdrawal timeline alone, and withdrawal is only the beginning of recovery. At The Ranch Pennsylvania Outpatient Services in Lancaster, our addiction treatment programs include a partial hospitalization program and an intensive outpatient program, with medication-assisted treatment available when clinically appropriate. If you need detox first, we can help coordinate it. You can verify your insurance online, and our admissions team is available 24/7. Calls are free and confidential.
