Medication-Assisted Treatment (MAT)

6 FDA-approved medications used to treat opioid and alcohol use disorder

Medically reviewed by Daniel Okafor, PMHNP-BC Last updated September 18, 2026
  • 6 FDA-approved medications for opioid and alcohol use disorder
  • Cuts opioid overdose death ~50% — methadone and buprenorphine
  • The standard of care per NIDA, SAMHSA and ASAM — not "swapping one drug for another"

The Most Effective Treatment We Have — and the Most Underused

Medication-assisted treatment, increasingly called medications for opioid use disorder (MOUD) or medications for addiction treatment (MAT), pairs an FDA-approved medication with counseling and behavioral therapy. For opioid use disorder in particular, the evidence is not ambiguous: methadone and buprenorphine roughly halve the risk of death and dramatically improve treatment retention compared with abstinence-only approaches. The National Institute on Drug Abuse, SAMHSA and the American Society of Addiction Medicine all regard medication as the standard of care.

Despite that, the majority of Americans with opioid use disorder receive no medication at all. Some of the gap is access — methadone can only be dispensed through federally certified opioid treatment programs, and rural coverage is thin. Much of it is stigma, including from within the recovery community and, unforgivably, from some treatment facilities that still require people to taper off buprenorphine before admission. That practice contradicts the evidence and puts lives at risk.

It is worth being precise about what these medications do. Methadone and buprenorphine occupy opioid receptors, eliminating withdrawal and craving without producing a high at a stable therapeutic dose. That is not substituting one addiction for another: addiction is compulsive use despite harm, while a stable prescribed dose restores the ability to work, parent and think about something other than the next dose. Naltrexone works the opposite way, blocking opioid effects entirely and reducing alcohol craving. Acamprosate and disulfiram target alcohol use disorder specifically, and lofexidine eases opioid withdrawal without being a treatment for the disorder itself.

Compare the six medications below, then use the table to see how they differ in mechanism, dosing and practical requirements. Any decision belongs with a prescriber who knows your history, but going into that conversation informed will make it a far better one.

If you or someone close to you uses opioids, carry naloxone (Narcan). It reverses an overdose within minutes, is available without prescription in every US state, and is often available at no cost through local health departments and harm reduction programs. Tolerance falls sharply within days of stopping, which makes the period after detox or release from incarceration the highest-risk window of all.

Medication Comparison

How the six approved medications differ in what they treat, how they work and what starting them requires.

Sources: FDA prescribing information, SAMHSA TIP 63 (Medications for Opioid Use Disorder) and ASAM National Practice Guideline. This is educational information, not medical advice — medication decisions belong with your prescriber.
MedicationTreatsHow it worksForm & frequencyKey requirements
MethadoneOpioid use disorderFull opioid agonist — occupies receptors, removing withdrawal and cravingDaily liquid at a certified opioid treatment program; take-homes earned over timeDaily clinic attendance at first; cardiac and interaction monitoring
Buprenorphine (Suboxone)Opioid use disorderPartial agonist with a ceiling effect, limiting respiratory depressionDaily film or tablet, or a monthly extended-release injectionMust be in mild withdrawal at induction or precipitated withdrawal can occur
Naltrexone (Vivitrol)Opioid and alcohol use disorderOpioid antagonist — blocks opioid effects and reduces alcohol rewardDaily 50 mg tablet or monthly intramuscular injection7–10 opioid-free days first; tolerance falls, raising overdose risk if use resumes
AcamprosateAlcohol use disorderModulates glutamate and GABA signalling disrupted by chronic drinkingTwo 333 mg tablets, three times dailyStarted after abstinence begins; dose reduced in kidney impairment
DisulfiramAlcohol use disorderBlocks aldehyde dehydrogenase, causing an acutely unpleasant reaction to alcoholOne daily tabletAt least 12 hours alcohol-free before the first dose; works best supervised
LofexidineOpioid withdrawal symptoms onlyAlpha-2 adrenergic agonist that dampens the noradrenaline surge of withdrawalTablets several times daily, for up to 14 daysLowers blood pressure; symptom relief only, not maintenance treatment

Medication-Assisted Treatment (MAT): Frequently Asked Questions

No, and this misconception keeps people from a treatment that saves lives. Addiction is defined by compulsive use despite harm, loss of control and a life organised around obtaining a substance. A stable therapeutic dose of methadone or buprenorphine produces none of that: it occupies opioid receptors so withdrawal and craving stop, without intoxication, allowing someone to work, parent and think clearly. The comparison is closer to insulin for diabetes than to continued drug use. NIDA, SAMHSA and ASAM are unanimous on this point.
There is no fixed endpoint, and longer is generally safer. Research consistently shows that people who stop buprenorphine or methadone, especially in the first year, relapse at high rates and face elevated overdose risk because tolerance has fallen. Many clinicians think in terms of years rather than months, and some people remain on medication indefinitely, which is a legitimate and successful outcome. If and when you do taper, do it slowly, with your prescriber, while you are stable — not during a crisis.
Methadone is a full opioid agonist with no ceiling on its effect, so it is often the better choice for high tolerance, long-term use or people who have not stabilised on buprenorphine. The trade-off is access: it can only be dispensed through federally certified opioid treatment programs, requiring daily attendance until take-home doses are earned. Buprenorphine is a partial agonist with a ceiling that makes overdose much less likely, and any prescriber can now write for it, so it can be collected from a pharmacy. Both cut mortality substantially.
Yes, and most people do. Buprenorphine is routinely prescribed in primary care, telehealth and outpatient addiction clinics, and the federal X-waiver requirement was eliminated in 2023, so any prescriber with a DEA registration can prescribe it. Methadone requires enrolment at a certified opioid treatment program but that is also outpatient. Medication combined with counseling in an outpatient setting is a complete and evidence-based treatment; residential care is added when withdrawal risk, co-occurring conditions or an unstable environment call for it.
Nearly always. Medicaid covers medications for opioid use disorder in every state, Medicare covers methadone through opioid treatment programs as well as office-based buprenorphine, and most commercial plans cover all approved medications under parity requirements. Costs you may still encounter are copays, prior authorisation for extended-release formulations such as Sublocade and Vivitrol, and clinic dispensing fees. If cost is a barrier, federally qualified health centers and state-funded opioid treatment programs offer sliding scale pricing.
Buprenorphine and methadone are the standard of care in pregnancy, and this is one of the clearest recommendations in the field. Withdrawing from opioids during pregnancy carries a high relapse rate and risks to the pregnancy, so continuing medication is safer for both mother and baby. Babies may experience neonatal opioid withdrawal syndrome, which is expected, treatable and short-term. Naltrexone, acamprosate and disulfiram have much less pregnancy safety data and are usually avoided. Tell any prescriber immediately if you are or may become pregnant.
It depends which medication. On naltrexone, opioids are blocked, so there is no effect — but attempting to override the blockade with high doses is extremely dangerous. On buprenorphine, the ceiling effect blunts additional opioids substantially, though combining with benzodiazepines or alcohol still carries real overdose risk. On methadone, added opioids or sedatives are genuinely dangerous. In all cases, tell your prescriber rather than hiding it. A lapse is clinical information that should adjust your dose or level of care, not grounds for discharge at a good program.

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