Types of Drug Testing
Drug testing is becoming increasingly common during the job application process, as part of random workplace drug testing, and as a condition of probation. Individuals who have not used illicit substances occasionally find themselves subjected to positive drug tests.
Blood, hair, urine, or saliva testing may be requested. Drug testing looks for alcohol as well as certain prescription medications and illegal substances. Amphetamines, barbiturates, benzodiazepines (such as Xanax and Valium), cocaine, designer drugs (bath salts, MDMA, etc.), marijuana, opioids (narcotics including heroin or prescription opiates such as codeine), and PCP (phencyclidine) can all be detected by drug testing.
A common type of drug test is called an immunoassay test. If this test produces a positive result, the laboratory may follow up with a GC-MS (gas chromatography-mass spectrometry) test, which greatly reduces the chances of a false positive.
Can a Drug Test Lead to a False Positive?
False positives on urine drug screenings are uncommon, but no testing method is 100% reliable, and false positives do happen. Some common causes of false positives include:
• Antidepressants. Sertraline (Zoloft) can cause a false positive reading for benzodiazepine. Bupropion (Wellbutrin) can cause a false positive for amphetamines.
Drug Testing Myths
• Passive marijuana smoke can cause a false positive. This is not a valid reason for a false positive; the amount of marijuana compounds the body ingests from passively breathing marijuana smoke is well below the cut-off level detected by the drug screenings.
via Counseling Center of Illinois https://www.duiillinois.com/can-drug-test-lead-false-positive/
Counseling Center of Illinois provides DUI evaluations for license reinstatement and DUI classes, along with other counseling services and classes in Chicago, IL, and the surrounding Illinois suburbs.