Medication-Assisted Treatment (MAT)
6 FDA-approved medications used to treat opioid and alcohol use disorder
- 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.
FDA-Approved Medications
Select a medication to find treatment centers and prescribers offering it in our directory.
Methadone
A long-acting full opioid agonist that eliminates withdrawal and craving. Dispensed daily through federally certified opioid treatment programs, with take-home doses earned over time.
View centersBuprenorphine (Suboxone)
A partial opioid agonist with a ceiling on respiratory depression, prescribable in any doctor's office. Suboxone combines it with naloxone to deter misuse by injection.
View centersNaltrexone (Vivitrol)
An opioid antagonist that blocks opioid effects and reduces alcohol craving. Available as a daily pill or monthly injection; requires 7 to 10 opioid-free days before starting.
View centersAcamprosate
Used for alcohol use disorder once abstinence begins, helping normalise glutamate signalling and easing protracted withdrawal symptoms. Taken three times daily and safe in liver disease.
View centersDisulfiram
Produces an intensely unpleasant reaction if alcohol is consumed, working as a deterrent rather than reducing craving. Most effective when dosing is supervised.
View centersLofexidine
A non-opioid alpha-2 agonist approved to relieve opioid withdrawal symptoms for up to 14 days. It eases detox but does not treat the underlying disorder.
View centersMedication Comparison
How the six approved medications differ in what they treat, how they work and what starting them requires.
| Medication | Treats | How it works | Form & frequency | Key requirements |
|---|---|---|---|---|
| Methadone | Opioid use disorder | Full opioid agonist — occupies receptors, removing withdrawal and craving | Daily liquid at a certified opioid treatment program; take-homes earned over time | Daily clinic attendance at first; cardiac and interaction monitoring |
| Buprenorphine (Suboxone) | Opioid use disorder | Partial agonist with a ceiling effect, limiting respiratory depression | Daily film or tablet, or a monthly extended-release injection | Must be in mild withdrawal at induction or precipitated withdrawal can occur |
| Naltrexone (Vivitrol) | Opioid and alcohol use disorder | Opioid antagonist — blocks opioid effects and reduces alcohol reward | Daily 50 mg tablet or monthly intramuscular injection | 7–10 opioid-free days first; tolerance falls, raising overdose risk if use resumes |
| Acamprosate | Alcohol use disorder | Modulates glutamate and GABA signalling disrupted by chronic drinking | Two 333 mg tablets, three times daily | Started after abstinence begins; dose reduced in kidney impairment |
| Disulfiram | Alcohol use disorder | Blocks aldehyde dehydrogenase, causing an acutely unpleasant reaction to alcohol | One daily tablet | At least 12 hours alcohol-free before the first dose; works best supervised |
| Lofexidine | Opioid withdrawal symptoms only | Alpha-2 adrenergic agonist that dampens the noradrenaline surge of withdrawal | Tablets several times daily, for up to 14 days | Lowers blood pressure; symptom relief only, not maintenance treatment |
Medication-Assisted Treatment (MAT): Frequently Asked Questions
Explore Other Treatment Categories
Every treatment option in our directory is organised into six browsable categories. Start anywhere — or call and let a specialist narrow it down for you.