Suboxone and methadone are both proven, first-line medications for opioid use disorder, and the right choice comes down to your health, your opioid use, and how much daily structure you need.

If you or someone you love is weighing these two options, the hardest part is already behind you, because you are looking for real treatment instead of trying to white-knuckle it alone. Both medications settle withdrawal and quiet cravings so your brain can rest and you can start rebuilding. They just get there by different routes, and those differences are worth understanding before you sit down with a prescriber.

This guide breaks down how each medication works, how they compare on safety and access, and how to think through which one fits your situation. For a wider look at how medication fits into recovery, see our overview of medication-assisted therapy and our opioid addiction treatment options.

What is Suboxone?

Suboxone is a combination medicine that contains two active ingredients: buprenorphine and naloxone. Buprenorphine is a partial opioid agonist, which means it activates the same brain receptors that opioids like heroin, oxycodone, or fentanyl use, but only partially. That is enough to stop withdrawal and cravings without the strong high of a full opioid. The naloxone is there mainly to discourage misuse by injection.

According to MedlinePlus, buprenorphine and naloxone comes as a tablet that dissolves under the tongue or a film placed against the cheek, taken once a day. In Ontario it is often the first medication a prescriber will suggest, partly because it tends to be safer in overdose and partly because many people can pick it up at a regular pharmacy and dose at home. If you want the pharmacology in more detail, we cover how long Suboxone stays in your system in a separate article.

What is methadone?

Methadone is a full opioid agonist. It fully activates opioid receptors, which is why it has been used for decades to treat both severe pain and opioid addiction. At the right dose it holds off withdrawal and cravings steadily across the whole day, with no high once your body is used to it.

Because it is a full agonist, methadone is more tightly controlled. MedlinePlus notes that people using methadone for opioid addiction usually enrol in a treatment program and, at least at the start, take their dose under supervision. It is a strong, reliable option, especially for people with a long history of opioid use or a very high tolerance. Many people worry about dependence, which we address directly in our piece on whether methadone is addictive.

Suboxone vs methadone: the key differences

Here is the short version before we get into the details. Both medications work. The real decision is about safety profile, daily convenience, and how severe the dependence is.

How they work: full agonist versus partial agonist

This is the difference that drives almost everything else. Methadone, as a full agonist, keeps activating opioid receptors as the dose climbs. That makes it powerful for severe dependence, but it also means the risk of slowed breathing keeps rising with the dose, which is why overdose is a real danger if methadone is combined with alcohol, benzodiazepines, or other opioids.

Buprenorphine, the opioid part of Suboxone, has what is called a ceiling effect. Past a certain dose, taking more does not increase the opioid effect much, including the effect on breathing. That ceiling is a big reason Suboxone carries a lower overdose risk and is often the safer starting point, especially for people managing treatment at home. Understanding this also helps explain how opioid overdose happens and why tolerance matters so much.

Getting started: induction and precipitated withdrawal

The two medications are started in almost opposite ways, and this trips a lot of people up.

With methadone, a prescriber can usually start you even before withdrawal sets in, then raise the dose slowly over days and weeks to find the level that holds you steady. It is a patient process, and it is deliberately cautious because of that breathing risk in the first few days.

Suboxone is different. Because buprenorphine grabs onto opioid receptors tightly and pushes other opioids off, taking it too soon can trigger what is called precipitated withdrawal, where withdrawal comes on fast and hard. To avoid that, you typically wait until you are already in mild to moderate withdrawal before the first dose. There is no single magic number of days to wait, despite what you may have read online. The timing depends on which opioid you were using and when you last used, and your care team will guide it. If you are not sure what early withdrawal even feels like, our guide to opioid withdrawal symptoms and stages covers it.

Access and daily life in Ontario

For a lot of people this is the deciding factor. Methadone, at least in the early months, often means showing up at a clinic or pharmacy for daily supervised dosing. That structure is genuinely helpful for some people and a burden for others, depending on work, family, and how far away the clinic is.

Suboxone tends to allow take-home doses sooner, so a stable week can look like a single pharmacy visit rather than seven. For people in smaller Ontario communities, or anyone juggling a job and childcare, that flexibility can be the difference between staying in treatment and dropping out. It is also why virtual opioid treatment has grown so quickly, since much of the care can happen by phone or video once you are stable. A long-acting monthly buprenorphine injection, Sublocade, is another option worth asking about if daily dosing does not fit your life.

Safety, side effects, and overdose risk

Both medications share common opioid side effects like constipation, drowsiness, and sweating. Methadone can affect heart rhythm at higher doses, so prescribers sometimes check an ECG, and its overdose risk is higher overall. Buprenorphine has been linked to dental problems, so good dental care matters while you are on Suboxone.

Whichever medication you use, it is smart to keep a naloxone kit on hand and make sure the people around you know how to use it. Opioids are far more dangerous when mixed with alcohol or sedatives, and the contaminated drug supply has made that risk worse across Ontario. Treatment with either medication sharply lowers the chance of a fatal overdose compared with ongoing unregulated use, which is the whole point of opioid addiction treatment and recovery.

Which one is right for you?

There is no universally better medication, only the one that fits you. A prescriber will weigh several things with you:

• How severe the dependence is. Very high tolerance or a long history of heavy opioid use can make methadone the stronger first choice.
• Your overdose risk. If lowering overdose danger is the priority, Suboxone and its ceiling effect often win out.
• Your daily life. Work, caregiving, travel, and distance from a clinic all push toward whichever option keeps you in treatment.
• Other health conditions. Heart rhythm issues, liver health, and medication interactions can tip the decision one way or the other.
• Mental health. Anxiety, depression, or trauma often travel alongside opioid use, and treating both together matters. Our article on concurrent disorders explains why.

Switching between methadone and Suboxone

Nothing is permanent. People move from methadone to Suboxone when they want more flexibility or a lower overdose risk, and others go from Suboxone back to methadone when buprenorphine does not fully hold their cravings. Switching from methadone to Suboxone takes care, because of that precipitated withdrawal risk, so it is always done with a prescriber rather than on your own. The takeaway is that your plan can change as your life and recovery change.

Getting OHIP-covered opioid treatment in Ontario

Thrive Medical is a Rapid Access Addiction Medicine (RAAM) clinic serving North York and the wider Greater Toronto Area, with virtual appointments available across Ontario. For eligible patients, assessment and opioid agonist therapy are OHIP-covered, and our team can walk you through coverage for the medication itself through programs like the Ontario Drug Benefit.

You do not need to have everything figured out before you reach out. A prescriber will help you decide between Suboxone and methadone based on your situation, start you safely, and adjust as you go. You can learn how same-week access works through our RAAM clinic explainer, see our virtual outpatient program, or review OHIP-covered addiction treatments. When you are ready, contact our team or send a referral, and we will take it from there.

Frequently Asked Questions

Is methadone or Suboxone more effective?

Both are effective, first-line treatments for opioid use disorder. Research suggests methadone can keep more people in treatment at adequate doses, while Suboxone offers a lower overdose risk. The better choice depends on the severity of your dependence and your daily needs, not on one being better overall.

Is Suboxone safer than methadone?

In terms of overdose, Suboxone generally carries a lower risk because buprenorphine has a ceiling effect, so its impact on breathing levels off. Methadone has no ceiling, so overdose risk rises with the dose. Both are safe when prescribed and taken as directed by a clinician.

Can I switch from methadone to Suboxone?

Yes, many people switch. It needs to be done carefully with a prescriber, because starting buprenorphine too soon after methadone can trigger precipitated withdrawal. Your care team will time the transition and guide the dosing so the change is as smooth and comfortable as possible.

Why do some people switch from Suboxone back to methadone?

Some people find that buprenorphine does not fully control their cravings, especially with very high opioid tolerance. Methadone, as a full agonist, can hold them more steadily. Switching back is a normal part of finding the right fit and is always done with medical guidance.

How long do you stay on Suboxone or methadone?

There is no set time limit. Some people stay on treatment for a year or two, others for many years, and that is medically fine. Staying on medication longer is linked to better outcomes. Any plan to taper off should be slow and guided by your prescriber.

Does Suboxone or methadone get you high?

Once you are on a stable dose, neither should make you feel high. Both prevent withdrawal and cravings so you feel normal and clear-headed. That stability is the goal, because it lets you focus on work, relationships, and the rest of your recovery instead of the next dose.

What is precipitated withdrawal?

Precipitated withdrawal is sudden, intense withdrawal that can happen if you take Suboxone too soon while full opioids are still active in your system. Buprenorphine displaces them from the receptors quickly. Waiting until you are in mild withdrawal before the first dose is how prescribers prevent it.

How long do I wait before starting Suboxone?

There is no single rule that fits everyone, despite what you may read online. The wait depends on which opioid you used and when you last used it, and it is measured by symptoms rather than a fixed number of hours. Your prescriber will tell you when you are ready.

Can you take buprenorphine and methadone together?

No, they are not taken together. They act on the same receptors in competing ways, so combining them can cause precipitated withdrawal. A prescriber uses one or the other and manages any switch between them carefully. Always tell your care team every medication you take.

Is Suboxone or methadone covered by OHIP in Ontario?

For eligible patients, the assessment and opioid agonist therapy are OHIP-covered, and the medication cost is often covered through the Ontario Drug Benefit or related programs. Coverage details vary by situation, so a clinic like Thrive Medical can confirm what applies to you before you start.

Can I get methadone or Suboxone through a virtual clinic?

Much opioid treatment can now happen virtually in Ontario, especially once you are stable. A first assessment and ongoing check-ins can often be done by phone or video, with the medication picked up at a local pharmacy. Some early steps may still need an in-person visit.

Do I have to go to a clinic every day?

Not necessarily. Methadone often involves daily supervised dosing early on, while Suboxone usually allows take-home doses sooner. As you stay stable, both can move toward fewer visits. The goal is always to fit treatment into your life so you can stick with it.

Is methadone or Suboxone addictive?

Both cause physical dependence, which means stopping suddenly brings withdrawal. That is different from addiction, which involves loss of control and harm. Used as prescribed, these medications treat addiction and help your life stabilize. Stopping should always be a slow, planned taper with your prescriber.

Can I take Suboxone or methadone during pregnancy?

Opioid agonist therapy is commonly used in pregnancy because untreated opioid use is riskier for both parent and baby. Both medications can be used with close medical supervision. If you are pregnant or planning to be, tell your prescriber so your care can be tailored safely.

What if one medication does not work for me?

Then your team adjusts. Dose changes, a switch between methadone and Suboxone, a long-acting buprenorphine injection, and added counselling are all options. Finding the right fit sometimes takes more than one try, and that is normal. The important thing is to stay in treatment while you sort it out.

Sources

• MedlinePlus (U.S. National Library of Medicine), Buprenorphine and Naloxone Sublingual and Buccal
• MedlinePlus (U.S. National Library of Medicine), Methadone
• Substance Abuse and Mental Health Services Administration (SAMHSA), Medications for Opioid Use Disorder
• Health Canada, Get help with substance use
• Centre for Addiction and Mental Health (CAMH), Opioid agonist therapy
• National Institutes of Health, Buprenorphine versus methadone treatment review

Last reviewed: November 2026. This article is for general educational purposes and does not replace medical advice. Talk to a licensed healthcare provider about your specific situation. If you or someone else may be overdosing, call 911.