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Compare buprenorphine vs naltrexone for opioid use disorder, including benefits, limits, treatment fit, and how MAT works with counseling and family care today.
New Hope Health
Editorial Team
Choosing between buprenorphine and naltrexone can feel overwhelming for people living with opioid dependence or another substance use disorder.
Both medications are supported by addiction research and are used by medical professionals to treat substance abuse, reduce the risk of opioid overdose, and help people recover from heroin, fentanyl, prescription opioids, and other illicit opioids.
This guide explains the differences between buprenorphine-naloxone, daily buprenorphine treatment, injectable extended-release naltrexone, and other medication-assisted treatment options so you can better understand your choices and discuss them with your care team.
Medication-assisted treatment, or MAT, is an evidence-based approach that combines FDA-approved medications with counseling and behavioral therapy to treat opioid use disorder.
The goals of MAT include:
MAT addresses both the physical and behavioral parts of addiction.
Many treatment plans also include family support and care for co-occurring mental health conditions such as depression, anxiety, or post-traumatic stress disorder.
Buprenorphine is a partial opioid agonist. It activates opioid receptors to a lesser degree than full opioid agonists such as heroin, fentanyl, or oxycodone.
When taken as prescribed, buprenorphine may:
Because it only partially activates opioid receptors, buprenorphine does not produce the full effects associated with heroin, fentanyl, or prescription opioid misuse.
Naltrexone is an opioid antagonist. It blocks opioid receptors and prevents opioids from producing rewarding effects.
Unlike buprenorphine, naltrexone:
A person must complete withdrawal and remain opioid-free before starting naltrexone.
Buprenorphine and naltrexone treat opioid use disorder in different ways.
Buprenorphine is a partial opioid agonist that reduces withdrawal symptoms and cravings by activating opioid receptors at a controlled level.
It can often begin after opioid withdrawal starts.
Naltrexone is an opioid antagonist that blocks opioid receptors and prevents opioids from producing rewarding effects.
It requires a complete opioid-free period before treatment begins because starting it too soon can trigger sudden withdrawal.
Buprenorphine is an opioid medication and may cause physical dependence. However, it has a ceiling effect that lowers some overdose risk compared with full opioid agonists.
Naltrexone is not an opioid, does not cause physical dependence, and does not produce a high.
However, naltrexone may be harder to start because patients must first complete detox and remain opioid-free.
Buprenorphine may benefit people who have:
Naltrexone may benefit people who:
Medical history, previous treatment response, relapse risk, personal goals, withdrawal status, and the ability to follow a dosing schedule all influence medication choice.
Buprenorphine may:
Naltrexone may:
Buprenorphine may cause:
Misuse is possible. Combining buprenorphine with alcohol, benzodiazepines, sleeping medications, or other sedatives can increase the risk of dangerous breathing problems.
Naltrexone may cause:
Naltrexone cannot begin until opioids are fully cleared from the body. It also does not relieve active withdrawal symptoms.
Both medications require medical evaluation and ongoing monitoring.
Factors that may affect medication choice include:
Buprenorphine usually begins after moderate opioid withdrawal symptoms appear.
Starting it too soon after fentanyl, heroin, methadone, or another opioid may trigger precipitated withdrawal.
A provider may review:
Naltrexone requires a complete opioid-free period before the first dose.
The required time varies depending on:
Starting naltrexone before opioids have cleared can cause sudden and severe withdrawal.
Buprenorphine is commonly taken as a daily sublingual tablet or film.
Weekly and monthly injectable forms of buprenorphine are also available.
Daily dosing allows providers to adjust treatment as recovery progresses.
Extended-release naltrexone is given as a monthly injection. This option may improve adherence for people who prefer not to take medication every day.
The best dosing option depends on:
Buprenorphine reduces withdrawal symptoms, opioid cravings, relapse risk, and overdose risk.
Naltrexone blocks opioid effects, but its protection decreases if injections are missed or treatment stops.
Research comparing the medications has found that both can support recovery after treatment begins. However, fewer people may successfully start naltrexone because of the required opioid-free period.
Some studies reported relapse rates of about 57% with buprenorphine and 65% with extended-release naltrexone.
In one trial, only about 53% of patients assigned to naltrexone successfully started treatment because they first needed to complete seven to 10 opioid-free days.
After treatment began, opioid-negative urine test results were similar between the groups.
Buprenorphine has a lower overdose risk than full opioid agonists when taken as prescribed.
However, combining it with alcohol, benzodiazepines, sleeping medications, or other sedatives can still cause life-threatening respiratory depression.
Naltrexone blocks opioid effects during treatment, but it does not provide ongoing protection after treatment ends.
Because opioid tolerance decreases during treatment, returning to a previous opioid dose after stopping medication can greatly increase overdose risk.
Patients should understand:
Buprenorphine is often used to treat addiction involving:
It can reduce withdrawal symptoms and cravings.
People using fentanyl may require careful medication timing because fentanyl can remain in body tissues longer than expected.
Naltrexone may be an effective option after detox for people recovering from fentanyl or prescription opioid addiction who have remained opioid-free.
The best medication depends on:
Opioid use disorder remains a major concern across Tennessee and Knoxville.
Substances contributing to addiction and overdose may include:
Fentanyl may also appear in cocaine, methamphetamine, and fake prescription pills.
This increases overdose risk for people who may not know they are taking an opioid.
Opioid addiction often occurs with:
Symptoms such as low mood, fear, intrusive memories, poor concentration, impulsive behavior, and sleep problems can increase cravings.
Some people may use opioids for temporary relief from physical or emotional pain.
Treating opioid use disorder and mental health symptoms together can improve:
Dual diagnosis treatment combines medication-assisted treatment with mental healthcare.
This approach helps patients manage:
Treating addiction and mental health conditions together may improve stability and reduce relapse risk.
Counseling helps patients:
Family support can:
MAT often works best when medication is part of a broader treatment plan that includes therapy, recovery support, and ongoing medical care.
Different levels of treatment provide different amounts of structure.
Residential treatment provides 24-hour support for severe symptoms, repeated relapse, or unstable living conditions.
A Partial Hospitalization Program, or PHP, provides intensive daytime treatment without an overnight stay.
An Intensive Outpatient Program, or IOP, provides structured therapy and medical support several days each week.
Standard outpatient care provides flexible counseling, medication management, and recovery support.
Clinicians choose the right MAT option by reviewing:
MAT may continue for several months or longer.
Treatment length depends on:
Switching medications may help when:
Medication changes should always occur under medical supervision.
People near Farragut and West Knoxville can look for licensed providers that offer:
A full evaluation can help determine the safest medication and level of care.
Seek help when opioid use causes:
Emergency care is needed for:
Call 911 and administer naloxone when available during a suspected opioid overdose.
Medical detox helps manage withdrawal symptoms and prepares patients for ongoing treatment.
Methadone treatment reduces cravings and withdrawal symptoms through a licensed opioid treatment program.
Residential treatment provides 24-hour care, structure, therapy, and relapse prevention.
A Partial Hospitalization Program offers intensive daytime treatment with medical and behavioral support.
An Intensive Outpatient Program provides several weekly therapy sessions while patients live at home.
Standard outpatient treatment offers flexible counseling, medication management, and recovery support.
Dual diagnosis treatment addresses opioid addiction and co-occurring mental health disorders together.
Peer and family support can strengthen accountability, communication, and long-term recovery.
Many private insurance plans, TennCare plans, and employer-sponsored policies may cover:
Coverage depends on:
A treatment provider can verify benefits before admission.
Choosing the right medication for opioid addiction depends on many factors, including opioid use history, withdrawal symptoms, treatment goals, relapse risk, and overall health.
Research published in medical journals has compared buprenorphine and extended-release naltrexone in randomized treatment groups. These studies have examined treatment initiation, heroin cravings, short-term abstinence, adverse events, relapse, and treatment retention.
In one comparison, about 94% of patients assigned to buprenorphine started treatment, compared with about 72% of those assigned to extended-release naltrexone after detox.
Treatment may include Suboxone, buprenorphine-naloxone, another buprenorphine product, or injectable extended-release naltrexone administered after detox.
The right medication, dose, naloxone access, counseling, and ongoing medical care can improve recovery while reducing side effects, relapse risk, overdose risk, and the effects of opioid use disorder.
At New Hope Healthcare, we are an in-network provider and work with many insurance plans, including:
If you or a loved one is struggling with mental health challenges or substance abuse, seeking treatment and emotional support is important.
Consulting a doctor or treatment professional can provide the support and guidance needed to choose an appropriate level of care.
Reach out to New Hope Healthcare today. Our team of compassionate professionals is here to support your journey toward lasting well-being.
Effective medication management can be an important part of the treatment process and may help improve safety and long-term success.
Call us at 866-799-0806.
The better option depends on withdrawal status, relapse risk, medical history, previous treatment, and personal goals. Buprenorphine can reduce cravings and withdrawal symptoms, while naltrexone blocks opioid effects after detox.
No. Naltrexone blocks opioid receptors and can trigger withdrawal if opioids or buprenorphine are still in the body.
Treatment length varies by person. Some patients benefit from several months of care, while others need longer treatment to reduce cravings, prevent relapse, and support recovery.
Yes. A person must be opioid-free before starting naltrexone to avoid sudden and severe withdrawal.
Buprenorphine can cause physical dependence, but it is used in controlled doses to reduce opioid misuse, cravings, withdrawal symptoms, and overdose risk.
Buprenorphine may be easier to start because it can manage withdrawal symptoms and cravings. Naltrexone may help after a person completes detox and remains opioid-free.
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