Opioid withdrawal
Opioid withdrawal is the autonomic, secretory, and gastrointestinal syndrome (piloerection, lacrimation, rhinorrhea, yawning, mydriasis, myalgias, diarrhea) that follows cessation, dose reduction, or antagonist reversal of opioid use, beginning within hours for short-acting opioids but taking days for long-acting agents such as methadone. Diagnosis is clinical. First-line treatment is an opioid agonist, methadone or buprenorphine, with clonidine and symptom-targeted agents added for residual symptoms.
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What this article covers
- Overview
Definition: the autonomic, secretory, gastrointestinal, and musculoskeletal syndrome that follows interruption, dose reduction, or antagonist reversal of opioid use in a dependent patient, marked by…
- Epidemiology
Scale of the underlying dependence: opioid-related overdoses killed almost 400,000 Americans from 1999 to 2017, and nearly 50,000 died in 2017 alone, a 12% rise over 2016; each carried the…
- Risk factors
Physiologic opioid dependence from any source: regular use of heroin, a prescription opioid, or methadone or buprenorphine maintenance, long enough to produce dependence.
- Pathophysiology
Chronic opioid agonism suppresses neurotransmitter release: opioid agonists act at mu receptors, closing presynaptic calcium channels and opening postsynaptic potassium channels, inhibiting release…
- Clinical features
Onset: hours after the last dose for a short-acting opioid or heroin, days for a long-acting opioid such as methadone.
- Differential diagnosis
Alcohol withdrawal syndrome: also produces tremor, diaphoresis, and agitation beginning hours after the last drink, but follows a predictable timeline toward withdrawal seizures and delirium tremens…
- Diagnosis
Opioid withdrawal is a clinical diagnosis, confirmed by history and the symptom complex, not by a lab or imaging test: it requires recent opioid interruption, dose reduction, or antagonist…
- Management
First, confirm objective withdrawal with the COWS score before dosing any opioid agonist, since starting too early precipitates a worse withdrawal.
- Complications
Dehydration and electrolyte loss from unmanaged vomiting and diarrhea.
- Prognosis
Self-limited and not fatal in the properly managed adult: symptoms resolve as the agonist or symptomatic regimen controls the acute phase, typically about 3 to 7 days, though dysphoria and cravings can persist longer.
- Prevention
Screen for opioid use, and screen pregnant patients specifically, since maternal use crosses the placenta and risks neonatal opioid withdrawal syndrome.
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Related articles
- Opioid use disorder
Opioid use disorder is a maladaptive pattern of opioid use causing significant impairment or distress, diagnosed by meeting 2 or more of 11 substance use disorder criteria within a 12-month period. First-line treatment is medication for opioid use disorder: buprenorphine or methadone maintenance for ongoing agonist therapy, or naltrexone once the patient is confirmed opioid-free, paired with psychosocial care and take-home naloxone.
- Alcohol withdrawal syndrome
Alcohol withdrawal syndrome is a staged, timeline-bound hyperexcitability state that follows abrupt cessation or reduction of heavy alcohol use, progressing from minor symptoms through alcoholic hallucinosis and withdrawal seizures to delirium tremens, a medical emergency with mortality as high as 5%. Diagnosis is clinical and severity is graded with the CIWA-Ar; first-line treatment is symptom-triggered benzodiazepine dosing plus thiamine given before glucose.
- Benzodiazepine withdrawal
Benzodiazepine withdrawal is the abstinence syndrome that follows abrupt discontinuation or rapid dose reduction after regular use, and like alcohol withdrawal it can be fatal through seizures and delirium, unlike opioid withdrawal. Management reinstates the drug, converts to a long-acting agent such as diazepam, and tapers the total daily dose by 10 to 25% every 1 to 2 weeks, reserving phenobarbital for refractory or severe cases.
- Sepsis
Sepsis is life-threatening organ dysfunction caused by a dysregulated host response to infection, identified by an acute rise in SOFA score of 2 points or more in a patient with known or suspected infection. Survival depends on recognizing the pattern early and completing the hour-1 bundle: lactate, blood cultures before antibiotics, broad-spectrum antibiotics such as cefepime 2 g IV every 8 hours, and 30 mL/kg crystalloid for hypotension or a lactate of 4 mmol/L or higher.
- Thyroid storm
Thyroid storm is a rare, life-threatening exaggeration of thyrotoxicosis with multiorgan dysfunction and mortality up to 30%, most often precipitated by discontinuation of antithyroid drugs, infection, surgery, or trauma in a patient with underlying hyperthyroidism. It is a clinical diagnosis treated emergently in the ICU with intravenous beta-blockade, a thionamide (propylthiouracil transitioning to methimazole), potassium iodide given only after the thionamide, and high-dose glucocorticoids.