Cocaine is one of the 'NIDA-5" standardly tested for in drug tests. It can be detected for approximately 48-72 hours after single use. Frequent or heavy use can be detected for longer.
The initial screening cutoff level is 300 ng/ml for cocaine and its metabolite benzoylecgonine. The GC/MS cutoff level is 150 ng/ml.
Cocaine is detectable with hair tests and is included in the standard set of substances tested for with these tests. Hair tests generally take the most recent 1.5 inches of growth and use those for testing. That provides a detection period of approximately 90 days. If an individual's hair is shorter than 1.5 inches, this detection period will be shorter.
In the past few years, new technologies have been developed which allow for saliva testing for the presence of Cocaine. We do not currently have information about what the detection period is for these tests.
Amoxicillin may create false positives in cocaine tests. [
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