Vivitrol® vs. Suboxone®: how they compare for opioid use disorder treatment

Weighing your options for opioid use disorder treatment can feel like a lot to take in, especially if you’re doing it before you’ve even talked to a doctor. That’s a smart place to start, though, because walking into that conversation with a clear picture of how these two medications work can make the whole thing feel less overwhelming.

What is Vivitrol, and how does it work?

Vivitrol® is the brand name for extended-release injectable naltrexone, given as a once-monthly intramuscular injection. Naltrexone is an opioid antagonist: Instead of activating opioid receptors, it blocks them, so it doesn’t relieve withdrawal or cravings the way an opioid-based medication does. Two conditions have FDA approval for Vivitrol: relapse prevention after completing opioid detox and treatment for alcohol use disorder.

What is Suboxone, and how does it work?

Suboxone® is the brand name for buprenorphine-naloxone, a daily sublingual film taken under the tongue. Buprenorphine is a partial opioid agonist, meaning it eases withdrawal and cravings without producing the same effects as a full opioid, and the naloxone component discourages nonmedical use. The FDA approves the buprenorphine-naloxone combination for opioid use disorder as part of a complete treatment plan that includes counseling.

Vivitrol vs. Suboxone: how starting treatment is different

The dosing schedule and starting period differ between Vivitrol and Suboxone (buprenorphine-naloxone).

	Vivitrol	Suboxone
Opioid-free period required before starting	At least 7 to 10 days, longer after methadone or buprenorphine	Started once mild to moderate withdrawal appears, typically hours after last use, not days
Dosing schedule	One injection every 4 weeks, given by a clinician	One dose daily, self-administered at home
Risk if started too early	Can trigger sudden, severe precipitated withdrawal	Can also cause precipitated withdrawal, but the window is hours, not days

The opioid-free requirement is the main practical barrier to starting Vivitrol, and it’s a factor a doctor weighs alongside a patient’s individual situation. Suboxone’s shorter window is one reason it can be started sooner after a patient’s last opioid use. This difference doesn’t tell you which medication fits your situation. It’s information worth bringing into your conversation with a doctor.

How Vivitrol and Suboxone compare on safety and side effects

Suboxone (buprenorphine-naloxone) and Vivitrol are commonly used to treat opioid use disorder. Like any medication, each has potential side effects and safety considerations.

	Vivitrol	Suboxone
Key safety considerations	Overdose risk if opioid tolerance is lost and opioids are then used to try to override the blockade; injection site reactions, which can occasionally be severe; possible liver effects at higher than approved doses	Serious breathing problems when combined with alcohol, benzodiazepines, or other sedatives; potential neonatal opioid withdrawal syndrome in babies exposed during pregnancy
Common side effects	Nausea, injection site pain or swelling, headache, trouble sleeping	Headache, nausea, constipation, sweating

Not everyone experiences side effects, and many can be managed with guidance from a doctor. Your doctor can help you understand the potential risks and benefits of each medication based on your health history and individual needs.

How Vivitrol and Suboxone compare in daily life and access

A clinician gives the Vivitrol shot once a month, during an in-person office visit. While the injection itself must be given in person, some clinicians may offer an initial consultation through telemedicine to discuss treatment options and determine whether Vivitrol is appropriate.

Suboxone (buprenorphine-naloxone) works differently. You can take it once a day, often at home. It can be prescribed in person or by telemedicine. The whole process of evaluation, prescription, and follow-up can often be done via telemedicine, including through QuickMD, without an office visit for a shot.

Suboxone (buprenorphine-naloxone) is widely recommended as a first-line treatment for opioid use disorder because of its proven effectiveness and accessibility. For patients ready to begin treatment, same-day Suboxone care through QuickMD offers a convenient way to connect with a doctor and explore treatment options from home.

What does the research say about effectiveness?

The X:BOT trial, funded by the federal government, is the largest head-to-head comparison of these two medications so far. Researchers randomly assigned 570 patients at eight community treatment programs to either extended-release naltrexone (Vivitrol) or buprenorphine-naloxone (Suboxone). Once a patient successfully started either medication, the two performed about the same at keeping people relapse-free.

A more significant difference was seen in how easily patients could begin treatment. Because Vivitrol requires patients to be opioid-free before starting, some patients had difficulty meeting this requirement and were unable to initiate treatment.