Suboxone contains buprenorphine, a long-acting medication with an elimination half-life that averages about 37 hours. Most of the drug leaves the body within a few days, but buprenorphine and its main breakdown product, norbuprenorphine, can still be detected in urine for up to roughly 7 to 14 days after the last dose. How long it stays depends on your dose, how long you have been taking it, your metabolism, and the type of test used.
This guide explains what those numbers mean in practice. It is written for education only and is not a way to time doses around a drug test. Suboxone is a prescription medication used in opioid addiction treatment, and any changes to how you take it should be made with your prescriber.
What Is Suboxone?
Suboxone is a combination medication used to treat opioid use disorder. It contains two ingredients:
- Buprenorphine, a partial opioid agonist that eases withdrawal and cravings without producing the full high of drugs like fentanyl or heroin.
- Naloxone, an opioid blocker added to discourage misuse by injection. Taken as directed under the tongue, naloxone is poorly absorbed and clears the body quickly.
Because buprenorphine is the ingredient that lingers, it is what most drug tests look for and what determines how long Suboxone stays in your system. Suboxone is one of the medications used in medication-assisted treatment for opioid dependence.
How Long Does Buprenorphine Stay in Your System?
Buprenorphine has a long elimination half-life, averaging around 37 hours and ranging in most people from about 24 to 42 hours. The half-life is the time your body needs to clear half of the drug.
As a rule of thumb, a medication is largely cleared after about five half-lives. For buprenorphine, that works out to roughly 8 days for the parent drug, though the norbuprenorphine metabolite can be detected for longer, especially in people who take it regularly. The liver breaks buprenorphine down mainly through the CYP3A4 enzyme, so medications and health conditions that affect the liver can change how quickly it clears.
Suboxone Detection Times by Test Type
Detection windows are approximate and vary from person to person. The ranges below reflect typical findings for buprenorphine and norbuprenorphine after the last dose.
| Test type | Approximate detection window |
|---|---|
| Urine | Up to about 7 to 14 days |
| Blood | Up to about 2 to 3 days |
| Saliva | Up to about 1 to 3 days |
| Hair | Up to about 1 to 3 months |
Urine testing is the most common method used in treatment programs because it offers the widest detection window and is non-invasive.
Does Suboxone Show Up on a Standard Drug Test?
Usually not. A standard opioid immunoassay, the panel most workplace and clinical screens use, is designed to detect drugs like morphine, codeine, and heroin. Buprenorphine has a different chemical structure and does not reliably trigger it.
Detecting Suboxone requires a specific buprenorphine test, which many addiction clinics use to confirm that patients are taking their medication as prescribed. So Suboxone will typically not cause a positive result on a general opioid screen, but it will show up when a buprenorphine-specific test is ordered.
What Affects How Long Suboxone Stays in Your System?
Several factors influence how quickly you clear buprenorphine:
- Dose. Higher doses take longer to clear.
- Length of use. Buprenorphine builds up with regular dosing, so long-term use can extend the detection window.
- Metabolism and age. A slower metabolism, which is more common with older age, lengthens clearance.
- Liver function. Because the liver processes buprenorphine, reduced liver function slows elimination.
- Body composition. Buprenorphine is fat-soluble and can be stored in body tissue, which affects timing.
- Other medications. Drugs that affect the CYP3A4 enzyme can speed up or slow down how fast buprenorphine breaks down.
Suboxone, Safety, and Stopping Treatment
Suboxone is prescribed to help people stay stable and reduce the risk of overdose. Stopping it suddenly can bring back withdrawal symptoms and cravings and raise the risk of returning to other opioids.
If you want to reduce or stop Suboxone, the safest approach is a gradual taper planned with your prescriber. The goal of treatment is stability and recovery, not passing or timing a drug test.
Getting OHIP-Covered Suboxone Treatment in Ontario
Thrive Medical is a Rapid Access Addiction Medicine (RAAM) clinic serving North York and the Greater Toronto Area, with virtual appointments available across Ontario. Assessment and treatment for opioid use disorder, including Suboxone, are covered by OHIP for eligible patients.
You can learn more about Suboxone treatment or review which addiction treatments are covered by OHIP. If you or someone you care about is ready to start, our team can usually see new patients quickly.
Frequently Asked Questions
How long does Suboxone stay in your urine?
Buprenorphine and its metabolite norbuprenorphine can typically be detected in urine for up to about 7 to 14 days after the last dose, though this varies with dose, length of use, and individual metabolism.
Does Suboxone show up on a standard opioid drug test?
No. Standard opioid immunoassays do not reliably detect buprenorphine because it has a different chemical structure. A specific buprenorphine test is needed to identify it.
How long does one dose of Suboxone last?
Because buprenorphine has a long half-life, a single daily dose usually controls withdrawal and cravings for 24 hours or more, which is why it is often taken once a day.
Is Suboxone treatment covered by OHIP in Ontario?
Yes. Assessment and treatment for opioid use disorder, including Suboxone, are covered by OHIP for eligible patients at RAAM clinics such as Thrive Medical.
Sources
- Kumar R, Viswanath O, Saadabadi A. Buprenorphine. StatPearls, National Library of Medicine.
- U.S. Substance Abuse and Mental Health Services Administration (SAMHSA), Buprenorphine information.
- Health Canada, Buprenorphine and naloxone product monograph.
Last reviewed: August 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 think you may be experiencing an opioid overdose, call 911.
