How Does Medication-Assisted Treatment Work for Opioid Use Disorder

Medication-Assisted Treatment (MAT) for opioid use disorder combines FDA-approved medications with counseling and behavioral therapies to provide a comprehensive approach to recovery. Medically assisted opioid treatment uses three main types of drugs that interact with the same brain receptors as opioids, but in safer ways.

Methadone is a long-acting opioid agonist that activates opioid receptors fully but slowly, preventing withdrawal symptoms and reducing cravings without producing euphoria when taken as prescribed. Buprenorphine is a partial opioid agonist that activates receptors but produces a weaker effect than full opioids. Naltrexone is an opioid antagonist that blocks opioid receptors entirely, preventing opioids from having any effect. It doesn’t relieve cravings or withdrawal, so it’s used after detoxification is complete.

Research consistently shows that medically assisted opioid treatment is the most effective treatment for opioid use disorder. The medical drug detox program improves retention in treatment, reduces illicit opioid use and overdose deaths, and helps people regain stability in their work and relationships. Treatment duration varies by individual, with some people benefiting from long-term or indefinite medication use.

Table of Contents

Which Medications Are Commonly Used in MAT for Opioids?
How Does MAT Reduce Cravings and Withdrawal Symptoms?
How Long Do People Stay on MAT for Opioid Use Disorder?
What our customers are saying
Who Is a Good Candidate for MAT for Opioids?
Key Takeaways on Medically Assisted Opioid Treatment
Resources

Which Medications Are Commonly Used in MAT for Opioids?

The three main FDA-approved medications used in MAT for opioid use disorder are:

1. Methadone

How it works: Full opioid agonist that prevents withdrawal and cravings by activating opioid receptors slowly and steadily

Key features:

• Taken daily as a liquid or tablet
• Must be dispensed at certified opioid treatment programs (OTPs)
• Requires daily clinic visits initially, though stable patients may earn take-home doses
• Long track record of effectiveness since the 1960s
• Requires careful dosing due to overdose risk

2. Buprenorphine

How it works: Partial opioid agonist that relieves withdrawal and cravings with a ceiling effect that limits overdose risk

Key features:

• Available as sublingual tablets/film, monthly injection, or implants
• Can be prescribed in office-based settings by certified providers
• Often combined with naloxone to prevent misuse
• More flexible treatment setting than methadone
• Lower overdose risk than methadone

3. Naltrexone

How it works: Opioid antagonist that completely blocks opioid receptors, preventing any opioid effects

Key features:

• Available as a daily pill or monthly injection (Vivitrol)
• Requires complete detoxification first (7-10 days opioid-free)
• No potential for misuse or diversion
• Doesn’t relieve cravings as effectively as the other two
• Good option for people who’ve completed detox and want to prevent relapse

Choosing the right medication depends on individual factors such as treatment history, lifestyle, medical conditions, and personal preferences. Healthcare providers work with patients to determine the most appropriate course of action for each patient’s situation.

 

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How Does MAT Reduce Cravings and Withdrawal Symptoms?

MAT reduces cravings and withdrawal symptoms by working directly with the brain’s opioid system, which becomes disrupted through repeated opioid use.

When someone uses opioids regularly, their brain adapts by:

• Reducing natural endorphin production
• Changing the number and sensitivity of opioid receptors
• Creating physical dependence where the brain expects opioids to function normally

When opioid use stops abruptly, this causes withdrawal symptoms like pain, nausea, anxiety, and intense cravings as the brain struggles without the substance to which it’s adapted.

How Each Medication Works

• Methadone’s approach: Occupies opioid receptors fully and remains active for 24-36 hours. This steady, long-lasting activation maintains receptor stimulation at a stable level, preventing the dramatic ups and downs that cause withdrawal and cravings. The brain receives consistent signals that prevent it from going into distress mode.
• Buprenorphine’s approach: Binds very tightly to opioid receptors and partially activates them. This provides enough stimulation to satisfy the brain’s adapted need for opioid receptor activation, preventing withdrawal, while the strong binding prevents other opioids from attaching. Its prolonged duration (24-48 hours) maintains stability.
• Naltrexone’s approach: Blocks receptors completely without activating them. It doesn’t directly relieve cravings or withdrawal, which is why patients must be fully detoxified first. Instead, it works psychologically—knowing that using opioids won’t produce effects can reduce the motivation to use.

By maintaining steady opioid receptor activity without euphoria, methadone and buprenorphine allow the brain to readjust over time gradually. This stability eliminates the cycle of intoxication and opioid withdrawal in Los Angeles that reinforces addiction, giving patients mental clarity and physical comfort to engage in recovery work.

How Long Do People Stay on MAT for Opioid Use Disorder?

The duration of MAT for opioid use disorder varies significantly by individual, with no universal timeline that works for everyone. Research shows that longer treatment duration is associated with better outcomes, and many experts now recommend viewing MAT as a long-term or even indefinite treatment, similar to how people with diabetes or hypertension take medication continuously.

Some individuals may benefit from staying on medication for a year or two, while others find that remaining on MAT for many years or permanently provides the best chance at sustained recovery. The decision about duration should be made collaboratively between the patient and their healthcare provider, taking into account factors like the severity of the addiction, length of opioid use, stability in recovery, presence of co-occurring mental health conditions, and the individual’s personal circumstances and support system.

Tapering off MAT too quickly significantly increases the risk of relapse and overdose, which is why clinical guidelines emphasize that patients should not feel pressured to discontinue medication before they’re ready. Studies indicate that individuals who remain on MAT have lower rates of illicit opioid use, reduced mortality, and better overall functioning compared to those who taper off prematurely.

The stigma surrounding long-term medication use can, unfortunately, pressure some people to stop treatment against medical advice. Still, the medical community increasingly recognizes that sustained MAT use is a legitimate and successful treatment approach rather than replacing one addiction with another.

What our customers are saying

Who Is a Good Candidate for MAT for Opioids?

Good candidates for MAT include anyone diagnosed with opioid use disorder who is motivated to pursue recovery and willing to engage with the treatment process. This encompasses people using prescription opioids like oxycodone or hydrocodone, as well as those using heroin or illicitly manufactured fentanyl.

MAT is appropriate across a broad spectrum of severity, including individuals in early stages of opioid dependence to those with long-standing, severe addiction. Pregnant women with opioid use disorder are particularly strong candidates, as MAT significantly reduces risks to both mother and baby compared to continued illicit opioid use or unsupervised withdrawal.

People who have attempted abstinence-only treatment without success, those with a history of multiple relapses, individuals facing significant withdrawal symptoms, and those at high risk for overdose all stand to benefit substantially from MAT. The treatment is also suitable for adolescents and young adults struggling with opioid dependence, as early intervention can prevent years of addiction-related consequences.

Key Takeaways on Medically Assisted Opioid Treatment

• MAT combines medication with behavioral support for comprehensive treatment.
• Three main medications work in different ways to support recovery.
• MAT works by stabilizing brain chemistry disrupted by opioid use.
• Treatment duration should be individualized, with more extended periods often being more effective.
• MAT is appropriate for anyone with opioid use disorder who’s willing to engage.

For patients interested in medically assisted opioid treatment, Muse Treatment in Los Angeles specializes in evidence-based care designed to support your journey to recovery from opioid addiction. Our dedicated team of professionals is committed to providing personalized treatment plans that cater to your unique needs. To learn more about how we can help you or a loved one reclaim a healthier life, please call us at 800-426-1818 today.

Resources

• FDA – Information about Medications for Opioid Use Disorder (MOUD)
• National Library of Medicine – Medication-Assisted Treatment for Opioid Use Disorder in a Rural Family Medicine Practice
• SAMHSA – Substance Use Disorder Treatment Options