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Addiction Medicine

Opioid Use Disorder

Diagnose opioid use disorder clinically with DSM-5 criteria, address overdose or psychiatric emergencies first, and promptly offer evidence-based medication treatment. Buprenorphine, methadone, and extended-release naltrexone have distinct initiation requirements, settings, and monitoring needs; withdrawal management alone is not treatment.

Clinical question: How should clinicians diagnose opioid use disorder and initiate, select, and monitor medication treatment while reducing overdose risk?

Diagnosis

Confirm OUD clinically and triage immediate threats

History and examination establish the diagnosis; laboratory testing supports safety and treatment planning.

OUD is diagnosed when at least 2 DSM-5 criteria occur within 12 months, with severity categorized as mild (2–3 criteria), moderate (4–5), or severe (6 or more). Tolerance and withdrawal should not be counted when opioids are taken solely under appropriate medical supervision. Wolters KluwerThe ASAM National Practice Guideline for the Treatment of ...PubMedCDC Clinical Practice Guideline for Prescribing Opioids for Pain — United States, 2022CDCOpioid Use Disorder: Diagnosis | Overdose Prevention | CDC

The initial priority is identification and management of overdose, drug-related impairment, acute trauma, suicidal or homicidal ideation, psychosis, delirium, or other urgent medical or psychiatric conditions. A complete biopsychosocial assessment is important but should not delay initiation of pharmacotherapy for OUD. Wolters KluwerThe ASAM National Practice Guideline for the Treatment of ...

Obtain opioid-specific history including agent(s), route, frequency and amount, last use, prior medication treatment, overdose history, and consequences of use. Assess alcohol, benzodiazepines and other sedative-hypnotics, stimulants, cannabis, nicotine, and other substance use; concurrent substance use warrants risk mitigation or a higher level of care but should not be used to withhold methadone or buprenorphine. Wolters KluwerThe ASAM National Practice Guideline for the Treatment of ...

DSM-5 OUD severity and clinical consequence. Wolters KluwerThe ASAM National Practice Guideline for the Treatment of ...PubMedCDC Clinical Practice Guideline for Prescribing Opioids for Pain — United States, 2022CDCOpioid Use Disorder: Diagnosis | Overdose Prevention | CDC
DSM-5 criteria in 12 monthsSeverityImmediate clinical implication
2–3MildConfirm impairment or distress, assess overdose and progression risk, and individualize treatment intensity. Wolters KluwerThe ASAM National Practice Guideline for the Treatment of ...PubMedCDC Clinical Practice Guideline for Prescribing Opioids for Pain — United States, 2022CDCOpioid Use Disorder: Diagnosis | Overdose Prevention | CDC
4–5ModerateOffer evidence-based medication treatment and harm-reduction interventions. Wolters KluwerThe ASAM National Practice Guideline for the Treatment of ...
6 or moreSevereOffer medication treatment promptly; assess need for more intensive services, co-occurring disorders, and overdose prevention. Wolters KluwerThe ASAM National Practice Guideline for the Treatment of ...

Pharmacotherapy

Select medication by physiologic state, treatment setting, and patient priorities

All three FDA-approved medications should be available; no medication has a prespecified maximum treatment duration. fdaInformation about Medications for Opioid Use Disorder ...Wolters KluwerThe ASAM National Practice Guideline for the Treatment of ...

FDA identifies buprenorphine, methadone, and naltrexone as approved medications for OUD. Medication choice should be shared and based on patient preference, past treatment response, current opioid dependence, capacity for monitored dosing, risk of diversion, comorbidities, and access to an opioid treatment program. fdaInformation about Medications for Opioid Use Disorder ...Wolters KluwerThe ASAM National Practice Guideline for the Treatment of ...

Methadone and buprenorphine are agonist therapies that suppress withdrawal and craving. Naltrexone is an opioid antagonist for relapse prevention after complete opioid withdrawal; starting it in a physically dependent patient can precipitate severe withdrawal. Wolters KluwerThe ASAM National Practice Guideline for the Treatment of ...

There is no recommended time limit for pharmacotherapy. If discontinuation is requested, address overdose risk from loss of tolerance, provide naloxone, and discuss continuation or transition to another medication. Wolters KluwerThe ASAM National Practice Guideline for the Treatment of ...

Medication selection and practical constraints for OUD. fdaInformation about Medications for Opioid Use Disorder ...Wolters KluwerThe ASAM National Practice Guideline for the Treatment of ...
MedicationBest-fit clinical contextKey initiation requirement and limitation
BuprenorphineOffice-based or opioid treatment program care; patients able to manage office- or home-based initiation. Wolters KluwerThe ASAM National Practice Guideline for the Treatment of ...For current opioid dependence, wait for objective withdrawal; initiating too early can precipitate withdrawal. Wolters KluwerThe ASAM National Practice Guideline for the Treatment of ...
MethadonePatients who may benefit from daily supervised dosing in an opioid treatment program or for whom buprenorphine has been unsuccessful. Wolters KluwerThe ASAM National Practice Guideline for the Treatment of ...Outpatient methadone for OUD is delivered through an opioid treatment program; accumulation, sedation, QT-related risk, and drug interactions require cautious titration. Wolters KluwerThe ASAM National Practice Guideline for the Treatment of ...
Extended-release injectable naltrexoneRelapse prevention in patients no longer physically dependent on opioids who prefer antagonist treatment or cannot use agonist therapy. Wolters KluwerThe ASAM National Practice Guideline for the Treatment of ...Requires complete opioid withdrawal; oral naltrexone is generally limited by poor adherence. Wolters KluwerThe ASAM National Practice Guideline for the Treatment of ...

Buprenorphine

Initiate buprenorphine after objective withdrawal

Traditional initiation avoids precipitated withdrawal from displacement of full agonists at the mu-opioid receptor.

For patients with current opioid dependence, do not begin standard buprenorphine initiation until objective withdrawal is present. ASAM notes that withdrawal generally begins 6–12 hours after short-acting opioids and 24–72 hours after long-acting opioids; a COWS score of 11–12 or greater is generally consistent with sufficient withdrawal for conventional office-based initiation. Wolters KluwerThe ASAM National Practice Guideline for the Treatment of ...

Begin with 2–4 mg and increase in 2–8 mg increments after assessing response. Following initiation, titrate to relief of withdrawal and craving and to enable cessation of nonprescribed opioid use. Evidence cited by ASAM suggests that doses of 16 mg/day or more may outperform lower doses; evidence above 24 mg/day is limited and higher doses may increase diversion risk. Wolters KluwerThe ASAM National Practice Guideline for the Treatment of ...

Office-based and home-based initiation are both considered safe and effective when selected using clinical judgment, prior buprenorphine experience, and the patient’s capacity to recognize and manage withdrawal. Low-dose or microdosing initiation is described in the literature, but the supplied CDC source characterizes evidence as limited. Wolters KluwerThe ASAM National Practice Guideline for the Treatment of ...PubMedCDC Clinical Practice Guideline for Prescribing Opioids for Pain — United States, 2022

Conventional buprenorphine initiation parameters. Wolters KluwerThe ASAM National Practice Guideline for the Treatment of ...
Decision pointAction
Current opioid dependenceConfirm objective withdrawal before first dose to reduce precipitated withdrawal. Wolters KluwerThe ASAM National Practice Guideline for the Treatment of ...
First doseBuprenorphine 2–4 mg. Wolters KluwerThe ASAM National Practice Guideline for the Treatment of ...
TitrationIncrease by 2–8 mg increments based on withdrawal, craving, sedation, and ongoing opioid use. Wolters KluwerThe ASAM National Practice Guideline for the Treatment of ...
Dose adequacyDose should suppress withdrawal and support discontinuation of nonprescribed opioid use; 16 mg/day or more may be more effective than lower doses. Wolters KluwerThe ASAM National Practice Guideline for the Treatment of ...
Early monitoringFrequent visits, PDMP review, drug testing, and diversion controls tailored to stability. Wolters KluwerThe ASAM National Practice Guideline for the Treatment of ...

Methadone

Use cautious methadone induction and opioid treatment program monitoring

Methadone is effective but requires slow titration because of its long and variable half-life.

Methadone is recommended for patients with OUD who can provide informed consent and have no specific contraindication. In the United States, ongoing outpatient methadone treatment for OUD is provided through opioid treatment programs; acute-care administration is possible under limited circumstances. Wolters KluwerThe ASAM National Practice Guideline for the Treatment of ...

The recommended initial dose is 10–30 mg, with reassessment as clinically indicated, typically 2–4 hours after dosing. For patients with absent or low opioid tolerance, use 2.5–10 mg. Federal limits cited by ASAM restrict the initial dose to no more than 30 mg and total first-day dose to no more than 40 mg. Wolters KluwerThe ASAM National Practice Guideline for the Treatment of ...

After stabilization, usual daily dosing is 60–120 mg, although some patients need lower or higher doses. Do not increase daily during early induction; typical increases are no more than 10 mg approximately every 5 days, guided by withdrawal, craving, and sedation. Wolters KluwerThe ASAM National Practice Guideline for the Treatment of ...

Methadone initiation and monitoring. Wolters KluwerThe ASAM National Practice Guideline for the Treatment of ...
PhaseRecommended approach
Initial dose10–30 mg; reassess typically after 2–4 hours. Use 2.5–10 mg for low or absent tolerance. Wolters KluwerThe ASAM National Practice Guideline for the Treatment of ...
First-day ceilingInitial dose no more than 30 mg; total first-day dose no more than 40 mg. Wolters KluwerThe ASAM National Practice Guideline for the Treatment of ...
TitrationGenerally no more than 10 mg approximately every 5 days; avoid automatic daily escalation. Wolters KluwerThe ASAM National Practice Guideline for the Treatment of ...
Usual maintenance range60–120 mg/day, individualized to withdrawal, craving, sedation, and treatment goals. Wolters KluwerThe ASAM National Practice Guideline for the Treatment of ...
QT risk managementAssess cardiac and medication risk; use ECG selectively for significant risk factors and consider above 120 mg/day. Wolters KluwerThe ASAM National Practice Guideline for the Treatment of ...

Antagonist Treatment

Use naltrexone only after opioid abstinence and avoid detoxification-only care

Antagonist treatment requires absence of physical opioid dependence; withdrawal management must connect to continuing OUD care.

Extended-release injectable naltrexone is recommended for relapse prevention in patients who are no longer physically dependent on opioids, can consent, and have no contraindication. The standard dose is 380 mg by deep gluteal intramuscular injection every 4 weeks; ASAM notes that some patients may benefit from dosing every 3 weeks, an approach supported by consensus rather than robust trial evidence. Wolters KluwerThe ASAM National Practice Guideline for the Treatment of ...

Before naltrexone, patients should be adequately withdrawn from opioids. ASAM describes a general interval of about 6 days without short-acting opioids and 7–10 days without long-acting opioids such as methadone or buprenorphine; a naloxone challenge may help when physiologic dependence is uncertain. Wolters KluwerThe ASAM National Practice Guideline for the Treatment of ...

Oral naltrexone is generally not recommended because adherence limits effectiveness; reserve it for unusual settings in which observed or otherwise highly reliable dosing is feasible. Wolters KluwerThe ASAM National Practice Guideline for the Treatment of ...

Naltrexone and withdrawal-management decisions. Wolters KluwerThe ASAM National Practice Guideline for the Treatment of ...
Clinical situationAction
Physical opioid dependence or acute withdrawalDo not initiate naltrexone; it can precipitate severe withdrawal. Wolters KluwerThe ASAM National Practice Guideline for the Treatment of ...
Appropriate candidate for extended-release naltrexoneAdminister 380 mg deep gluteal IM every 4 weeks after complete opioid withdrawal. Wolters KluwerThe ASAM National Practice Guideline for the Treatment of ...
Uncertain opioid-free statusConsider a naloxone challenge before naltrexone, except during pregnancy. Wolters KluwerThe ASAM National Practice Guideline for the Treatment of ...
Patient requests detoxification onlyExplain relapse and overdose risk; offer ongoing methadone, buprenorphine, or appropriate antagonist treatment rather than withdrawal management alone. Wolters KluwerThe ASAM National Practice Guideline for the Treatment of ...PubMedCDC Clinical Practice Guideline for Prescribing Opioids for Pain — United States, 2022

Longitudinal Care

Monitor response, address co-occurring conditions, and prevent overdose

Retention alone is not a sufficient endpoint; monitor safety, opioid use, function, and engagement in patient-defined goals.

Medication management includes assessment of response, adherence, ongoing substance use, adverse effects, dose titration, education, and linkage to recovery and medical services. Do not discontinue OUD treatment solely because of continued use of opioids or other substances; instead reassess dose, medication choice, treatment intensity, and social supports. Wolters KluwerThe ASAM National Practice Guideline for the Treatment of ...

Assess psychosocial needs and offer or refer for behavioral health services, but refusal or unavailability of psychosocial treatment must not delay medication treatment. Motivational interviewing or motivational enhancement can support engagement. Wolters KluwerThe ASAM National Practice Guideline for the Treatment of ...

In 2022, an estimated 3.7% of U.S. adults needed OUD treatment, but only 25.1% received medication treatment; treatment gaps and inequities support routine clinical identification and low-threshold treatment access. CDCTreatment for Opioid Use Disorder: Population Estimates - CDC

Longitudinal monitoring targets in OUD care. Wolters KluwerThe ASAM National Practice Guideline for the Treatment of ...
DomainWhat to assessAction if concerning
Medication responseWithdrawal, craving, sedation, continued opioid use, adverse effects, adherence. Wolters KluwerThe ASAM National Practice Guideline for the Treatment of ...Adjust dose, medication, visit frequency, or level of care; do not stop treatment solely for continued use. Wolters KluwerThe ASAM National Practice Guideline for the Treatment of ...
Other substance exposureAlcohol, benzodiazepines and other sedatives, stimulants, and nonprescribed controlled substances. Wolters KluwerThe ASAM National Practice Guideline for the Treatment of ...Conduct individualized risk-benefit assessment, coordinate prescribers, intensify monitoring, and address co-occurring substance use. Wolters KluwerThe ASAM National Practice Guideline for the Treatment of ...
SafetyOverdose history, naloxone access, psychiatric instability, infectious complications, pregnancy. Wolters KluwerThe ASAM National Practice Guideline for the Treatment of ...Provide naloxone, urgent psychiatric or medical referral when indicated, and appropriate infectious disease or obstetric care. Wolters KluwerThe ASAM National Practice Guideline for the Treatment of ...
Treatment integrityPDMP, drug testing tailored to stability and setting, medication counts or observed dosing when needed. Wolters KluwerThe ASAM National Practice Guideline for the Treatment of ...Interpret results clinically and nonpunitively; use findings to improve safety and engagement. Wolters KluwerThe ASAM National Practice Guideline for the Treatment of ...

Common questions

Does opioid tolerance alone establish opioid use disorder?

No. OUD requires at least 2 DSM-5 criteria within 12 months causing clinically significant impairment or distress. Tolerance and withdrawal do not count when opioids are taken solely under appropriate medical supervision. Wolters KluwerThe ASAM National Practice Guideline for the Treatment of ...PubMedCDC Clinical Practice Guideline for Prescribing Opioids for Pain — United States, 2022CDCOpioid Use Disorder: Diagnosis | Overdose Prevention | CDC

When can buprenorphine be started after opioid use?

For conventional initiation in a physically dependent patient, wait for objective withdrawal. ASAM describes typical onset 6–12 hours after short-acting opioids and 24–72 hours after long-acting opioids; a COWS score of 11–12 or higher generally indicates sufficient withdrawal. Wolters KluwerThe ASAM National Practice Guideline for the Treatment of ...

Should benzodiazepine use prevent buprenorphine or methadone treatment?

No. Concurrent benzodiazepines or other sedative-hypnotics increase risk, but untreated OUD can pose greater harm. Use an individualized risk-benefit assessment, careful medication management, and increased monitoring rather than automatically withholding agonist treatment. Wolters KluwerThe ASAM National Practice Guideline for the Treatment of ...

Is detoxification an adequate treatment for opioid use disorder?

No. Withdrawal management alone is not recommended because relapse, overdose, and overdose death are more likely after tolerance decreases. Link withdrawal care directly to ongoing medication treatment and follow-up. Wolters KluwerThe ASAM National Practice Guideline for the Treatment of ...PubMedCDC Clinical Practice Guideline for Prescribing Opioids for Pain — United States, 2022

Which patients should receive naloxone?

Patients with OUD or a history of OUD should receive naloxone or a prescription, and likely bystanders should be trained in overdose response. Naloxone should be administered for suspected overdose. Wolters KluwerThe ASAM National Practice Guideline for the Treatment of ...

References

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