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A member asked:
My grandmother recently had a stroke, she was given a routinely urine test and it came back positive for cocaine, my grandma has never touched it?
A doctor has provided 1 answer
See details: False positive tests occur 5-10% of the time. Certain antibiotics, for instance, may cause a false positive test for cocaine. Ignore the test results.
Answered 7/31/2014
3.8k views
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