False Positive
Test Results
False positive test results can be attributed to human error and sample contamination. In addition, there are a number of foods, drugs, and chemicals that will cause a false positive result. These are some of the reasons why labs will immediately split your specimen into two samples. Below are some of the many substances to avoid prior to testing. Take this very seriously, your employer or probation officer certainly will. False positives run high with the EMIT, and in some cases this is all it takes to send you to the unemployment office or a parole/probation revocation hearing. National laboratories state that the EMIT test is wrong 25% to 30% of the time, and can result in false positives from legal substances up to 38% of the time.
Antibiotics
Certain antibiotics such as Penicillin and Tetracycline can cause false positive results for heroin or cocaine.
Cold remedies, diet pills, hay fever remedies and pain relievers
In blind testing, decongestants and many diet aids resulted in false positives for amphetamine use in one third of all test samples given to 40 leading substance testing laboratories. There are more than 300 over-the-counter drugs that |
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