Negative. Positives are reported with a quantitative LC-MS-QToF or LC-MS/MS result.
Current Cutoff Levels for Toxicology
Measurement of buprenorphine and norbuprenorphine assist the clinician in determining patient compliance with treatment. Presence of the metabolite insures actual administration of the parent drug, however, quantitation of neither can be used to determine time or amount of dosage. No therapeutic ranges are established for the compounds in urine.