This question has also been asked and answered here: How long does Suboxone stay in your system?
Suboxone can be detected in your system for up to 11 days (or perhaps a bit longer depending on the patient's metabolism and other body functions).
A mass balance study of buprenorphine showed complete recovery of radiolabel in urine (30%) and feces (69%) collected up to 11 days after dosing. Almost all of the dose was accounted for in terms of buprenorphine, norbuprenorphine, and two unidentified buprenorphine metabolites. In urine, most of buprenorphine and norbuprenorphine was conjugated (buprenorphine, 1% free and 9.4% conjugated; norbuprenorphine, 2.7% free and 11% conjugated). In feces, almost all of the buprenorphine and norbuprenorphine were free (buprenorphine, 33% free and 5% conjugated; norbuprenorphine, 21% free and 2% conjugated).
Buprenorphine has a mean elimination half-life from plasma of 37 h.
Naloxone has a mean elimination half-life from plasma of 1.1 h.
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