One MD told me it can test positive for cocaine and another MD said it can not. Does anyone know for sure? The drug test I am asking about is a urine test. Any help would be greatly appreciated.
24 Nov 2010
As Marjorie indicated, lidocaine should not cause a positive for cocaine in a UA. False positives are so common, they should develop a more accurate, cost efficient system so people do not lose their jobs, denied new jobs, have probation revoked, lose a custody case, and end up with a bad reputation as a drug abuser. I found this excerpt from an article I thought you might find interesting. Also, some of the chemicals used in the test kits have a short shelf life and can also cause false positives. But the number one reason for inaccurate results is poor quality controls in these labs. That's why it's so important to tell the tester everything you have taken within the past 30 days. Regardless of whether it was prescribed or not.
"Laboratory slip-ups are to blame for many of the mistaken test results. But even perfect labs running perfect tests will also find many false positives.
False positives are caused by:
*Nasal decongestants such as Dristan, Neosynephren, Vicks Nasal Spray, and Sudafed, which cause false positives for amphetamines.
*Poppy seeds like those on a dinner roll, which cause false positives for opiates. Even the highest-quality test currently available, the GCMS test, still confuses poppy seeds with heroin.
*Pain relievers such as Advil, Nuprin, Midol, Trendar, or any medicine containing Ibuprofin cause false positives for marijuana.
*Antibiotics such as amoxicillin or ampicillin cause false positives for cocaine.
The above list is only a beginning. Most substances which people have in their blood have never been tested to see if they cause false positives. Indeed, even some natural body enzymes cause false positives. According to research validated by the Congressional Office of Technology Assessment, melanin, the natural pigment which makes skin dark, can cause false positives for marijuana"
- Lidocaine Information for Consumers
- Lidocaine Information for Healthcare Professionals (includes dosage details)
- Side Effects of Lidocaine (detailed)
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