What Opioid Withdrawal Actually Feels Like, and What to Do Next

Opioid withdrawal symptoms happen because your body has adapted to the presence of opioids. When the drug leaves your system, your nervous system doesn’t quiet down gradually. It overcorrects. That’s why withdrawal feels the way it does, like your body turning against you all at once.

Symptoms range from uncomfortable to genuinely severe, and they look different depending on which opioid you were taking, how long you’ve been taking it, and factors specific to your body and health history. What you read below is what the clinical research shows. Your experience may be different, and that’s worth talking through with a provider.

If you’re in withdrawal right now and struggling, call the SAMHSA National Helpline at 1-800-662-HELP (4357). It’s free, confidential, and available 24 hours a day.

What is Opioid Withdrawal?

Opioid withdrawal is what happens when someone who’s developed a physical dependence on opioids suddenly stops taking them, or reduces their dose significantly. The body adjusts its chemistry around the drug’s presence, and when that presence disappears, it takes time for the nervous system to recalibrate.

It’s a physiological process and NOT a sign of weakness or lack of willpower. The discomfort of withdrawal and physical pull is one of the main reasons people return to using. It’s that strong, and it’s also why medically supported treatment exists.

Opioid Withdrawal Symptoms

Withdrawal symptoms split into two categories: physical and psychological. Most people experience both, and they can overlap rather than experience symptoms in a neat sequence. Symptoms can vary in severity, depending on the specific opioid, the duration of use, and individual factors.

Physical symptoms include:

• Muscle aches, cramps, and joint pain
• Nausea, vomiting and diarrhea
• Excessive sweating and chills
• Runny nose and watery eyes
• Fever
• Goosebumps and skin crawling sensations
• Rapid heart rate
• Dilated pupils

Psychological symptoms include:

• Intense anxiety and agitation
• Insomnia (often severe, lasting several days)
• Restlessness that feels impossible to sit with
• Depression that can set in as physical symptoms ease
• Cravings that may be stronger than anything you’ve felt before

The physical symptoms are usually what people expect, but the psychological ones (especially the insomnia and anxiety) are often what makes withdrawal so hard to get through alone. According to SAMHSA, the psychological symptoms of withdrawal are a primary driver of relapse during unsupported cessation attempts. (Source: SAMHSA, Treatment Improvement Protocol 45, 2023)

How Long Does Withdrawal Last?

There’s no single answer. The timeline depends primarily on whether you were taking a short-acting or long-acting opioid, and how long you were taking it.

Here’s what the research shows (as a general framework):

Short-acting opioids (heroin, oxycodone, hydrocodone, codeine): Symptoms typically begin 8 to 24 hours after the last dose, peak within 1 to 3 days, and begin to ease by day 5 to 7. Physical symptoms generally resolve within 10 days. Psychological symptoms (especially cravings, depression, and sleep disruption) can persist for weeks or months.

Long-acting opioids (methadone, extended-release formulations): Onset is slower, usually 24 to 48 hours after the last dose. The peak phase is often less intense but longer, lasting up to two weeks. Residual symptoms follow a similar pattern of weeks to months.

The Three Stages of Opioid Withdrawal

The opioid withdrawal timeline is different for each person, but withdrawal can be generally split into three stages of progression: early, peak, and late.

Early stage (hours 6–36)

For short-acting opioids, symptoms start within 6 to 12 hours. For long-acting opioids, you may not feel much for the first 24 to 36 hours.

Early symptoms are often described as feeling like a severe flu: muscle aches, sweating, restlessness, anxiety, runny nose, and the beginning of cravings. It’s uncomfortable but manageable for most people, which is why some people may underestimate what’s coming next.

Peak stage (hours 72 through day 6)

The peak stage of opioid withdrawal is often the most challenging and intense phase. For short-acting opioids, the peak typically hits around 72 hours. For long-acting opioids, days 4 to 6.

Nausea and vomiting are at their worst. Diarrhea can be severe enough to cause dehydration. Muscle spasms, abdominal cramps, chills, and profound insomnia all compound at the same time. Cravings are intense. This is the stage where medical support makes the most difference because symptoms are much safer and more manageable with professional support and oversight.

Late stage (day 7 onward)

Physical symptoms gradually ease up after the peak stage. Most people feel noticeably better by day 7 to 10 for short-acting opioids, and by day 10 to 20 for long-acting ones.

What often surprises people is that the psychological symptoms (the depression, anxiety, difficulty sleeping, low motivation, and cravings) can continue long after the physical ones are gone. This phase, sometimes called post-acute withdrawal syndrome (PAWS), is one of the reasons that detox alone is not a treatment for opioid use disorder. The biology of dependence runs deeper than the acute withdrawal window.

Quitting Opioids Safely

Opioid use disorder (OUD) is a medical condition. It changes your brain chemistry and affects the body in ways that make stopping without support genuinely difficult. It’s not a moral failing or character flaw. Medical supervision matters most during the withdrawal phase itself, which is managed by detox and withdrawal programs.

Eleanor Health is an outpatient treatment program and we work with people who have completed or stabilized from acute withdrawal and are ready to begin longer-term care.

What that longer-term care looks like:

Medication-assisted treatment (MAT): FDA-approved medications including buprenorphine (Suboxone) and naltrexone (Vivitrol) reduce cravings and can help prevent return to use. According to NIDA, people receiving MAT are significantly more likely to remain in treatment and avoid relapse than those who attempt recovery without medication. (Source: NIDA, Medications to Treat Opioid Use Disorder Research Report, 2021)

Behavioral therapy: Individual therapy addresses the patterns, triggers, and underlying experiences that interact with substance use. Cognitive behavioral therapy (CBT) is the most studied approach for OUD.

Peer support: People with lived experience in recovery are part of Eleanor’s care team. Peer connection is one of the most consistent factors in long-term recovery outcomes.

If you’re ready to talk about what comes next, Eleanor Health can help. Start with a free insurance check — most major plans accepted, including Medicaid in many of our operating states.If you are going through withdrawal or just need help with your opioid use disorder, Eleanor Health can help. Learn more about our virtual opioid addiction treatment services.