Can Lidocaine Cause A Positive Drug Test (Page 3)
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I went to court, and took a drug screen and I was tested positive for cocaine. The day before my doctor gave me a shot that had lidocaine in it.

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To the Forensic lab tech. Thank you so much. Your post saved my sanity. I have a bad tooth which is scheduled to be pulled in a few days. It hurts so bad that I have been almost drinking a 2% Lidocaine solution. I was bathing my tooth and gums every 4 hours. I'm a towboat captain and we had just had a 5 panel DOT plus a company 10 panel drug test. I googled this issue and you were the only person to definitively say it would not show up as a positive for Cocaine. In addition, 15 years ago I was a Cocaine user, tested positive, and lost my license for 8 years. Even though I have been clean for 15 years, I knew no one, especially the CG, would believe me. Well, it has been over 12 days since the test so I guess everything is OK. I have learned a lesson. Research the RX that you are prescribed. Thank You so much. Percy

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The problem with science is its been wrong before. Until it can be proved otherwise they are going to think there is no way they are wrong. I know for a fact he is wrong. There may be factors he is not willing to consider. A positive test does not mean you ever have used drugs.

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There is no way that any of the caines can test positive for cocaine on a drug screen. The actual test itself does not test for the substance, it tests for the metabolite that the body produces when you ingest cocaine....The only way the body produces that metabolite is if you do cocaine, lc/gc/ms confirmation will show that and just so you know a false positive can be proven in a lab as well, if they send the test for lc/gc/ms confirmation it will tell you exactly what caused the positive result.......And if there is nothing there then low and behold its a false positive, but as I said originally, lidocaine is not even a schedule drug, you can buy it over the counter in most pharmacies, cocaine is a schedule two drug.

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Same thing hapenned to me 3 times after going to the dentist + having juvaderm injections! All of which used novocaine + lidocaine.... My dentist uses a ton on me!!!!! I was in total shock when iwas told I was positive for cocaine which I had not used since the 80's...........I have horrible back problems......I take 30 ml of morphine 4 times a day +up to 8 percocet a day...now my Doc is going to dump me ! HELP this is B.S.

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I am in the same situation. Had skin cancer removed and hit with drug test two days later. Showed positive for cocaine...

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Back in 2006 I was taking hair follicle drug tests every 90 days for probation. I passed the first three, and then came up positive for cocaine (which I DID NOT do) the fourth time I took one. I wracked my brain for explanations, and realized the only thing I had done differently was go to the dentist, who used lidocaine on me. Of course the people in the drug testing business don't like to admit that their tests are faulty. So I got a probation violation for it. Luckily not a revocation. I found a lot of other stories about people going through something similar when I searched for answers online. Something needs to be done about inaccurate drug tests, in order to protect innocent people.

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What ever happened? My husband is facing the same thing. We are a family of 7 and depend on him. Please answer!

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PLEASE HELP... A week or two ago I was asked to submit a random drug test for work...This was no problem. I have been through the procedure many times before and since the test wasn't mandatory I volunteered to take the test. To my SURPRISE a few days later I was told that I can up positive for cocaine...Which is absolutely 100 percent IMPOSSIBLE since I do not use any kind of drugs...illicit or prescribed! So I back tracked to anything that could be different during the days prior to my test. Only difference between this test and the numerous ones I have taken in the past was that I saw a dermatologist a few days prior to the test and had a skin sample taken from my wrist. During the procedure the Dr. injected Lidocaine to numb the area so it wouldn't hurt as much. So I called the Dr. explained my situation and they told me that infact lidocaine was a derivative of cocaine. So is THIS the culprit?? This Dr. also prescribed me pregnazone and a topical steroid cream that I used for a week to help get rid of an allergic reaction...can any of those medications cause me to be positive for cocaine? Like I said there Is just NO WAY I take illicit drugs...if I did how stupid of me would it have been to VOLUNTEER for the drug screen. Has anyone ever heard of this? Ive asked my Dr. to fax my work the information stating that lidocaine was used during the procedure...hoping I can find a common medium between the two...PLEASE HELP

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From what I could gather, Caine anesthetics seem to be notorious for causing false positives for cocaine. This includes Novocaine, Benzocaine, Lidocaine, etc.

If you were to take any course of action, I would recommend insisting on additional testing & perhaps requesting a GC/MS test (Gas Chromatography / Mass Spectrometry), as it is considered to be the most definitive method for confirming the presence of a drug in the urine.

I think it's down right unfair for companies to not use this type of testing right off the bat, since there are so many false-positives being reported on a daily basis. At this point in time though, the best advice I can offer is that you try to dispute your case by getting re-tested using that method.

I hope this helps!

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