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.
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 Kluwer+2Wolters 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 KluwerWolters 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 KluwerWolters KluwerThe ASAM National Practice Guideline for the Treatment of ...
Physical examination should assess intoxication, objective withdrawal, injection-related complications, cardiopulmonary disease, liver disease, pregnancy, and acute infection. Wolters KluwerWolters KluwerThe ASAM National Practice Guideline for the Treatment of ...
Use COWS, OOWS, SOWS, or CINA to quantify withdrawal when it informs medication initiation or reassessment; scales support but do not replace diagnostic assessment. Wolters KluwerWolters KluwerThe ASAM National Practice Guideline for the Treatment of ...
Recommended baseline testing includes CBC, liver enzymes, tuberculosis testing, hepatitis B and C testing, HIV testing, and consideration of sexually transmitted infection testing; offer hepatitis A and B vaccination when appropriate. Wolters KluwerWolters KluwerThe ASAM National Practice Guideline for the Treatment of ...
Perform pregnancy testing for women of childbearing potential and review contraception and reproductive goals. Wolters KluwerWolters KluwerThe ASAM National Practice Guideline for the Treatment of ...
Use drug testing during assessment and treatment to support medication adherence assessment and identify alcohol, illicit, and controlled substances. Interpret results in the context of assay limitations and clinical history. Wolters Kluwer+1Wolters KluwerThe ASAM National Practice Guideline for the Treatment of ...PubMedAddressing Opioid Use Disorder in General Medical Settings - Medications for Opioid Use Disorder - NCBI Bookshelf
Check the state PDMP to identify controlled-substance prescribing and potentially hazardous combinations; medications dispensed through opioid treatment programs may not appear in the PDMP. Wolters KluwerWolters 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. fda+1fdaInformation 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. fda+1fdaInformation 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 KluwerWolters 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 KluwerWolters KluwerThe ASAM National Practice Guideline for the Treatment of ...
| Medication | Best-fit clinical context | Key initiation requirement and limitation |
|---|---|---|
| Buprenorphine | Office-based or opioid treatment program care; patients able to manage office- or home-based initiation. Wolters KluwerWolters KluwerThe ASAM National Practice Guideline for the Treatment of ... | For current opioid dependence, wait for objective withdrawal; initiating too early can precipitate withdrawal. Wolters KluwerWolters KluwerThe ASAM National Practice Guideline for the Treatment of ... |
| Methadone | Patients who may benefit from daily supervised dosing in an opioid treatment program or for whom buprenorphine has been unsuccessful. Wolters KluwerWolters 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 KluwerWolters KluwerThe ASAM National Practice Guideline for the Treatment of ... |
| Extended-release injectable naltrexone | Relapse prevention in patients no longer physically dependent on opioids who prefer antagonist treatment or cannot use agonist therapy. Wolters KluwerWolters KluwerThe ASAM National Practice Guideline for the Treatment of ... | Requires complete opioid withdrawal; oral naltrexone is generally limited by poor adherence. Wolters KluwerWolters 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 KluwerWolters 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 KluwerWolters 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 Kluwer+1Wolters KluwerThe ASAM National Practice Guideline for the Treatment of ...PubMedCDC Clinical Practice Guideline for Prescribing Opioids for Pain — United States, 2022
See patients frequently early in treatment until stability is established; early weekly visits, drug testing including buprenorphine and metabolites, and medication counts or recall visits are diversion-reduction strategies. Wolters KluwerWolters KluwerThe ASAM National Practice Guideline for the Treatment of ...
Alcohol, benzodiazepines, and other sedative-hypnotics increase respiratory-depression risk, but FDA and ASAM advise that this should not automatically preclude or suspend buprenorphine treatment; use careful medication management and an individualized risk-benefit assessment. Wolters KluwerWolters KluwerThe ASAM National Practice Guideline for the Treatment of ...
When transitioning from buprenorphine to naltrexone, allow 7–14 days after the last buprenorphine dose to ensure absence of physical opioid dependence. Wolters KluwerWolters KluwerThe ASAM National Practice Guideline for the Treatment of ...
A transition from buprenorphine to methadone does not require a delay because moving from a partial to a full agonist does not typically precipitate withdrawal. Wolters KluwerWolters KluwerThe ASAM National Practice Guideline for the Treatment of ...
| Decision point | Action |
|---|---|
| Current opioid dependence | Confirm objective withdrawal before first dose to reduce precipitated withdrawal. Wolters KluwerWolters KluwerThe ASAM National Practice Guideline for the Treatment of ... |
| First dose | Buprenorphine 2–4 mg. Wolters KluwerWolters KluwerThe ASAM National Practice Guideline for the Treatment of ... |
| Titration | Increase by 2–8 mg increments based on withdrawal, craving, sedation, and ongoing opioid use. Wolters KluwerWolters KluwerThe ASAM National Practice Guideline for the Treatment of ... |
| Dose adequacy | Dose should suppress withdrawal and support discontinuation of nonprescribed opioid use; 16 mg/day or more may be more effective than lower doses. Wolters KluwerWolters KluwerThe ASAM National Practice Guideline for the Treatment of ... |
| Early monitoring | Frequent visits, PDMP review, drug testing, and diversion controls tailored to stability. Wolters KluwerWolters 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 KluwerWolters 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 KluwerWolters 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 KluwerWolters KluwerThe ASAM National Practice Guideline for the Treatment of ...
Obtain cardiovascular history and assess QT-prolongation risk. Consider ECG for prior QTc greater than 450 ms, ventricular arrhythmia history, syncope, structural heart disease, electrolyte abnormalities, QT-prolonging medications, abnormal liver enzymes, or high methadone doses; ASAM consensus suggests ECG consideration above 120 mg/day. Wolters KluwerWolters KluwerThe ASAM National Practice Guideline for the Treatment of ...
For QTc 450–500 ms, discuss risk-benefit and correct modifiable risks. Do not start methadone with known QTc greater than 500 ms; if this develops during treatment, consider dose reduction, removal of contributing drugs or risks, and transition to buprenorphine. Wolters KluwerWolters KluwerThe ASAM National Practice Guideline for the Treatment of ...
Use caution with alcohol, sedative-hypnotics, and benzodiazepines, but do not withhold methadone solely because of benzodiazepine use when untreated OUD risk is greater; increase monitoring and medication-management support. Wolters KluwerWolters KluwerThe ASAM National Practice Guideline for the Treatment of ...
Patients transitioning from methadone to buprenorphine generally tolerate transfer best after reduction to 30–40 mg/day or less and development of mild-to-moderate withdrawal before buprenorphine. Wolters KluwerWolters KluwerThe ASAM National Practice Guideline for the Treatment of ...
| Phase | Recommended approach |
|---|---|
| Initial dose | 10–30 mg; reassess typically after 2–4 hours. Use 2.5–10 mg for low or absent tolerance. Wolters KluwerWolters KluwerThe ASAM National Practice Guideline for the Treatment of ... |
| First-day ceiling | Initial dose no more than 30 mg; total first-day dose no more than 40 mg. Wolters KluwerWolters KluwerThe ASAM National Practice Guideline for the Treatment of ... |
| Titration | Generally no more than 10 mg approximately every 5 days; avoid automatic daily escalation. Wolters KluwerWolters KluwerThe ASAM National Practice Guideline for the Treatment of ... |
| Usual maintenance range | 60–120 mg/day, individualized to withdrawal, craving, sedation, and treatment goals. Wolters KluwerWolters KluwerThe ASAM National Practice Guideline for the Treatment of ... |
| QT risk management | Assess cardiac and medication risk; use ECG selectively for significant risk factors and consider above 120 mg/day. Wolters KluwerWolters 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 KluwerWolters 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 KluwerWolters 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 KluwerWolters KluwerThe ASAM National Practice Guideline for the Treatment of ...
Do not offer withdrawal management alone as treatment for OUD. It does not provide ongoing relapse prevention and is associated with increased relapse, overdose, and overdose death risk after loss of opioid tolerance. Wolters Kluwer+1Wolters KluwerThe ASAM National Practice Guideline for the Treatment of ...PubMedCDC Clinical Practice Guideline for Prescribing Opioids for Pain — United States, 2022
For opioid withdrawal, methadone and buprenorphine are more effective than alpha-2 agonists for symptom reduction, retention in withdrawal management, and completion. Wolters KluwerWolters KluwerThe ASAM National Practice Guideline for the Treatment of ...
Lofexidine is FDA-approved for symptoms of abrupt opioid withdrawal; clonidine is used off-label. Both are alpha-2 adrenergic agonists, but methadone and buprenorphine remain more effective withdrawal-management options. Wolters KluwerWolters KluwerThe ASAM National Practice Guideline for the Treatment of ...
Ultra-rapid opioid detoxification under anesthesia is not recommended because of serious adverse events and death. Wolters KluwerWolters KluwerThe ASAM National Practice Guideline for the Treatment of ...
| Clinical situation | Action |
|---|---|
| Physical opioid dependence or acute withdrawal | Do not initiate naltrexone; it can precipitate severe withdrawal. Wolters KluwerWolters KluwerThe ASAM National Practice Guideline for the Treatment of ... |
| Appropriate candidate for extended-release naltrexone | Administer 380 mg deep gluteal IM every 4 weeks after complete opioid withdrawal. Wolters KluwerWolters KluwerThe ASAM National Practice Guideline for the Treatment of ... |
| Uncertain opioid-free status | Consider a naloxone challenge before naltrexone, except during pregnancy. Wolters KluwerWolters KluwerThe ASAM National Practice Guideline for the Treatment of ... |
| Patient requests detoxification only | Explain relapse and overdose risk; offer ongoing methadone, buprenorphine, or appropriate antagonist treatment rather than withdrawal management alone. Wolters Kluwer+1Wolters 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 KluwerWolters 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 KluwerWolters 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. CDCCDCTreatment for Opioid Use Disorder: Population Estimates - CDC
Provide naloxone to all patients treated for or with a history of OUD and train family members or significant others in overdose response. Wolters KluwerWolters KluwerThe ASAM National Practice Guideline for the Treatment of ...
Naloxone should be administered for suspected opioid overdose and may be given during pregnancy to save the mother’s life. Wolters KluwerWolters KluwerThe ASAM National Practice Guideline for the Treatment of ...
Reassess mental health and suicide risk. Patients with suicidal or homicidal ideation require immediate evaluation and potentially hospitalization. Wolters KluwerWolters KluwerThe ASAM National Practice Guideline for the Treatment of ...
Pregnant patients with opioid dependence should receive methadone or buprenorphine as early as possible; withdrawal management or psychosocial care alone is not recommended. Wolters KluwerWolters KluwerThe ASAM National Practice Guideline for the Treatment of ...
Encourage breastfeeding for patients receiving methadone or buprenorphine unless contraindications are present. Wolters KluwerWolters KluwerThe ASAM National Practice Guideline for the Treatment of ...
For patients with pain and active untreated OUD, consider methadone or buprenorphine so pain and OUD are addressed concurrently. Wolters KluwerWolters KluwerThe ASAM National Practice Guideline for the Treatment of ...
| Domain | What to assess | Action if concerning |
|---|---|---|
| Medication response | Withdrawal, craving, sedation, continued opioid use, adverse effects, adherence. Wolters KluwerWolters 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 KluwerWolters KluwerThe ASAM National Practice Guideline for the Treatment of ... |
| Other substance exposure | Alcohol, benzodiazepines and other sedatives, stimulants, and nonprescribed controlled substances. Wolters KluwerWolters 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 KluwerWolters KluwerThe ASAM National Practice Guideline for the Treatment of ... |
| Safety | Overdose history, naloxone access, psychiatric instability, infectious complications, pregnancy. Wolters KluwerWolters 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 KluwerWolters KluwerThe ASAM National Practice Guideline for the Treatment of ... |
| Treatment integrity | PDMP, drug testing tailored to stability and setting, medication counts or observed dosing when needed. Wolters KluwerWolters KluwerThe ASAM National Practice Guideline for the Treatment of ... | Interpret results clinically and nonpunitively; use findings to improve safety and engagement. Wolters KluwerWolters 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 Kluwer+2Wolters 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 KluwerWolters 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 KluwerWolters 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 Kluwer+1Wolters 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 KluwerWolters KluwerThe ASAM National Practice Guideline for the Treatment of ...
References
- Opioid Use Disorder: Endpoints for Demonstrating ... — www.fda.gov · www.fda.gov
- FDA Approves First Test to Help Identify Elevated Risk of Developing Opioid Use Disorder | FDA — www.fda.gov · www.fda.gov
- Information about Medications for Opioid Use Disorder ... — www.fda.gov · www.fda.gov
- Implementation of screening and assessment tools for ... — www.sciencedirect.com · www.sciencedirect.com
- The ASAM National Practice Guideline for the Treatment of ... — journals.lww.com · journals.lww.com
- Nonopioid Substance Use Disorders and Opioid Dose ... — www.sciencedirect.com · www.sciencedirect.com
- Framework for opioid use disorder screening and ... — www.sciencedirect.com · www.sciencedirect.com
- Evaluation of a primary care-based Medication for Opioid ... — www.sciencedirect.com · www.sciencedirect.com
- Medication-Assisted Treatment of Opioid Use Disorder — journals.lww.com · journals.lww.com
- Management of opioid use disorders: a national clinical practice guideline - PMC — pmc.ncbi.nlm.nih.gov · pmc.ncbi.nlm.nih.gov
- CDC Clinical Practice Guideline for Prescribing Opioids for Pain — United States, 2022 — pmc.ncbi.nlm.nih.gov · pmc.ncbi.nlm.nih.gov
- Management of opioid use disorder: 2024 update to the national clinical practice guideline — pmc.ncbi.nlm.nih.gov · pmc.ncbi.nlm.nih.gov
- Opioid Use Disorder: Evaluation and Management - StatPearls - NCBI — www.ncbi.nlm.nih.gov · www.ncbi.nlm.nih.gov
- Management of Opioid Use Disorder, Opioid Withdrawal, and Opioid Overdose Prevention In Hospitalized Adults: A Systematic Review of Existing Guidelines — pmc.ncbi.nlm.nih.gov · pmc.ncbi.nlm.nih.gov
- Addressing Opioid Use Disorder in General Medical Settings - Medications for Opioid Use Disorder - NCBI Bookshelf — www.ncbi.nlm.nih.gov · www.ncbi.nlm.nih.gov
- Telehealth-Delivered Opioid Agonist Therapy for the Treatment of Adults with Opioid Use Disorder: Review of Clinical Effectiveness, Cost-Effectiveness, and Guidelines - NCBI Bookshelf — www.ncbi.nlm.nih.gov · www.ncbi.nlm.nih.gov
- Buprenorphine Formulations for the Treatment of Opioid Use Disorders: A Review of Comparative Clinical Effectiveness, Cost-Effectiveness and Guidelines - NCBI Bookshelf — www.ncbi.nlm.nih.gov · www.ncbi.nlm.nih.gov
- Management of opioid use disorder: 2024 update to the ... — pubmed.ncbi.nlm.nih.gov · pubmed.ncbi.nlm.nih.gov
- Consensus Recommendations on the Treatment of Opioid ... — www.acep.org · www.acep.org
- Treatment for Opioid Use Disorder: Population Estimates - CDC — www.cdc.gov · www.cdc.gov
- CDC Clinical Practice Guideline for Prescribing Opioids ... — www.cdc.gov · www.cdc.gov
- Opioid Use Disorder: Diagnosis | Overdose Prevention | CDC — www.cdc.gov · www.cdc.gov
- Treatment of Opioid Use Disorder | Overdose Prevention | CDC — www.cdc.gov · www.cdc.gov
- Use of Opioids for Adults With Pain From Cancer or Cancer ... — ascopubs.org · ascopubs.org