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What drug tests detect
Cocaine is on most standard drug panels.
Unlike buprenorphine and fentanyl, cocaine metabolites are included in virtually all standard drug panels — including the SAMHSA-5, the 10-panel test, and most employer and clinical screens. The tests detect benzoylecgonine, the primary metabolite of cocaine, not cocaine itself.
This means cocaine use may be detectable for longer than its subjective effects last — the intoxication period is shorter, while detectable metabolites persist longer.
Detection windows
How long cocaine metabolites are detectable.
Urine — most common
Benzoylecgonine is typically detectable in urine for 2–4 days after a single use. Heavy or chronic use can extend this to 10–14 days or longer in some cases. Cocaine is rapidly metabolized — the detection window for cocaine itself is short, while the metabolite window is substantially longer.
Blood
Cocaine is detectable in blood for approximately 12–24 hours. Benzoylecgonine may persist slightly longer. Blood testing is primarily used in clinical and forensic settings.
Saliva
Cocaine is detectable in oral fluid for approximately 1–2 days after use. Saliva testing is used in some roadside and point-of-care settings.
Hair
Hair follicle testing can detect cocaine use for up to 90 days, consistent with the standard hair testing window. This is a longer detection window than urine or blood and is used in some clinical and legal contexts.
In the context of buprenorphine treatment
What a positive cocaine result means in treatment.
Cocaine use can occur during buprenorphine treatment for opioid use disorder. The two drugs work through different mechanisms and one does not directly block the other.
In treatment programs that follow evidence-based practice, a positive cocaine result is a clinical data point — not automatic grounds for discharge. It may prompt a clinical conversation about support needs or possible adjustments to the treatment plan. It does not indicate that buprenorphine treatment has failed or should be discontinued.
At MyStreetHealth, a positive drug screen does not result in discharge. We use testing results to inform care, not to penalize patients.
Sources
Where this information comes from.
SAMHSA Mandatory Guidelines for Federal Workplace Drug Testing
Standard panel definitions and cutoff levels including cocaine.
Moeller KE et al. — Clinical Interpretation of Urine Drug Tests (Mayo Clin Proc, 2017)
Detection windows and clinical interpretation of urine drug screens. Mayo Clinic Proceedings 2017;92(5):774–796.