Detox for Heroin: What Withdrawal Feels Like, How Long It Lasts, and What Comes After

Early withdrawal symptoms feel like the start of a bad flu. Anxiety, agitation, yawning, sweating, watery eyes, runny nose, and muscle aches.

Symptoms peak at 24 to 72 hours.

• Nausea, vomiting, diarrhea, chills, and goosebumps.
• Physical pain in muscles, bones, and joints.
• Insomnia and restlessness, with leg movements that make lying still impossible.
• Depression, anxiety, and cravings strong enough to override every plan.

Most physical symptoms improve after about a week. Acute withdrawal symptoms can last 3 to 10 days depending on the length and amount of heroin use, physical health, other drug use, and other factors like fentanyl in the supply.

Post acute withdrawal syndrome can last weeks or months after detox. Mood swings, anxiety, low energy, poor sleep, and cravings without warning. These lingering effects are the psychological aspects of heroin withdrawal, and they are why relapse risk in heroin addiction stays high for the first year.

Medically supervised detox lasts five to seven days on average. Staff track symptoms with the Clinical Opiate Withdrawal Scale, an 11 item checklist of pulse, sweating, restlessness, pupil size, aches, and anxiety. Scores of 5 to 12 are mild, 13 to 24 moderate, and above 36 severe. The score tells the team when to start medication and how much.

Symptom specific medications handle the withdrawal symptoms that linger, mostly nausea, diarrhea, and insomnia.

• Buprenorphine, a partial opioid agonist sold as Suboxone when combined with naloxone. It can ease withdrawal symptoms within an hour of the first dose and reduces cravings. Most detox programs start Suboxone once the withdrawal scale confirms early withdrawal, because starting too soon makes symptoms worse.
• Methadone, a full agonist given daily through a licensed clinic. It manages withdrawal completely and is the oldest medication for opioid use disorder.
• Lofexidine, a non opioid medication the FDA approved for up to 14 days to reduce withdrawal discomfort in patients stopping opioids abruptly.
• Naltrexone, an opioid blocker started only after detox is complete. It does not help with withdrawal, but it lowers relapse risk once treatment starts.

Inpatient detox means a bed, 24/7 monitoring, and rapid medical treatment. It is the right call for heavy or long term heroin use, a history of complicated withdrawal, dependence on other substances, a co-occurring mental health disorder, or medical conditions that make dehydration dangerous. Outpatient detox with buprenorphine works for patients with a stable home and a lower level of drug use, and it is how many people start medication assisted treatment and stay on it.

MAT combines methadone, buprenorphine, or naltrexone with counseling for opioid use disorder. In one trial cited by the National Institute on Drug Abuse, every patient on placebo failed treatment, compared with 25 percent on buprenorphine, and 20 percent of patients who dropped out died within the year. Medication assisted treatment reduces cravings, cuts overdose risk, and is the recommended approach in pregnancy, where untreated opioid use disorder is riskier for the baby than the medication.

Cognitive behavioral therapy is effective for heroin use disorder, and contingency management has strong evidence behind it. Therapy handles the psychological symptoms and the addiction detox leaves untouched.

Depression, PTSD, and anxiety drive a large share of heroin use and other substance use disorders. Treating the mental health disorder and the addiction at the same time is the treatment approach with the best long term success.

Treatment options after detox run from residential treatment to day programs to outpatient care. Residential rehab suits people who relapse every time they go home. A relapse prevention plan, support groups, and emotional support from family maintain sobriety once the structure loosens. Long term recovery from heroin addiction is built on those.