False Positive on Drug Test, page 167

False Positives Forum

This forum is intended to help those who Do NOT Abuse Drugs. We do NOT support the illegal use of any substance. If you have experience with false positives, share your experience. What would you tell someone about drug testing and false positives? Please remember that we do not give medical or legal advice.

Positive for cocaine with a mouth swab test
Date: 1/8/2012
I was recently been notified I had come up positive for cocaine in a mouth swab test. I have not come in contact with the drug, touched the drug, or even seen the drug in 2yrs. That is why I am writing. I am assuming this is a preliminary and was told that is was to be tested a 2nd time. Would that be a GS/MS Test?

I must state that I was an active user of cocaine and was in prison for sales 2yrs ago. But I have NOT used anything for 2yrs. So my background don’t speak well for me. Now my integrity of my sobriety is now in jeopardy seen through my NA/AA peers. But there is also parole. But my sobriety means the most to me.

There was only 1 medication I took the night before I was tested and that was Legatrin PM over the counter leg cramp pain reliever and sleep aid. I have read that no medication can come up positive but, I SWEAR TO GOD as my witness…That I NEVER DID ANY COCAINE… Is it possible that this med triggered the positive for cocaine and will the confirmatory test prove this? Should I be concerned? I have been beating my self up with this…


AskDocWeb: Welcome back Darrin. Your question about Legatrin PM was answered on the previous page. If your test result was a false positive then the confirmation test will return a negative result. However, you may want to find out exactly what they mean when they say it will be tested a 2nd time. If they are talking about a confirmation test then that’s great. That will eliminate any false positives. If they are talking about any other kind of test then you may want to request a GC/MS confirmation test.

I did not see the nurse label my specimen
Date: 1/8/2012
I took a 7 panel substance abuse drug test a few months ago. It came back positive for THC, something that I am not using. I had an injection of DepoMedrol end an injection of Decodron about a month before the test. I have been on Cephadne, Lexparo, Lorapazepam, Hydrocodone, and Naproxen for about 6 months. These medications did not show up. I don’t understand Why they did not show up in the test. Could it be possible that the test could have been Mislabeled? What substance abuse should have resulted in a postive for these medications? I did not see the nurse label my specimen nor did I sign anything when I gave her my specimen.


AskDocWeb: Hmmm. Might be a problem with a lack of quality control if they do not use a chain of custody form. Without that form there is no way to show who had access to the sample and no assurance that the sample was correctly labeled, not tampered with or even switched.

Saffron extract?
Date: 1/8/2012
Would saffron extract cause a false positive?


AskDocWeb: We have found no evidence that would suggest that saffron extract (Crocus sativus L) might cause a false positive on urine drug tests for drugs of abuse.

Date: 1/9/2012
I know someone that took 3 Benadryl and when he took a UA for probation he had a false positive for Benzo. After sending off to the lab, it was proven it was the Benadryl. I just thought others should know this, so they do not have to go down the WALK OF SHAME, when they did nothing wrong.


AskDocWeb: Thanks LEMatt, Benadryl is already on the list. However, it is not just false positives for benzodiazepines but there is also a possibility of false positives for PCP or tricyclic antidepressants.

Traditional Chinese herbs for stress
Date: 1/9/2012
I am taking two traditional Chinese herbs for stress reduction… Magnolia officinalis and Phellodendron amurense, referred as a product called Relora… Will either of these herbs show up as a false positive for anything else on a urine drug test?


AskDocWeb: We didn’t find any link between Relora and false positives on urine tests. However, you might want to go easy on the Magnolia officinalis. It contains aristolochic acid, which causes rapidly progressive fibrosing interstitial nephritis and renal failure. It is also linked to urothelial malignancy. Urothelial malignancy accounts for about 80% of all tumors of the urinary tract.

Date: 1/10/2012
Will amisulpride give a false positive for THC?


AskDocWeb: We didn’t find anything about a false positive for THC but did for opioids. In the book “Clinical Toxicological Analysis: Procedures, Results, Interpretation, Volume 1” there is a reference to amisulpride feigning or giving the appearance of buprenorphine, which is a very potent opioid. That book is a complete reference on the standardized methods for laboratory analysis for clinical toxicologists.

Can Gemfibrozil cause a false positive for THC?
Date: 1/10/2012
I have not smoked pot in 10+ yrs and have not been around anyone who smokes or smoking. Needless to say I have had my urine tested every week/once a week for the last 4 years with no problems. Then I start this medicine “gemfibrozil” and I start getting positive urine tests for THC? When I called walgreens they said there is no known relation? How did this happen?


AskDocWeb: We found one isolated report that suggests gemfibrozil might cause a false positive test for marijuana so it is worth getting a confirmation test to check it out. See the Journal of Analytical Toxicology (JAT) 1999, article by Lewis JH. Interference of Gemfibrozil with Roche TesTcup.

False positive for opiates?
Date: 1/10/2012
Good morning and thanks for your help on this. My daughter recently had a drug test come back positive for opiates. She is on trileptal, wellbutrin, metformin, propanolol, imitrex, midrin, takes Ibuprofen, excedrin migraine for headaches. She is also prediabetic. Can any of these things cause a false positive for opiates? Again, thanks for your help with this.


AskDocWeb: Some of those medications are known to cause a false positive for other things but not for opiates. The only possibility of innocence that we see is a diabetic condition. If you believe that is the case then getting a GC/MS confirmation test may be warranted.

Read more feedback about false positives:

Previous Page
This is page 167 – NextLast Page 300

If you find this page useful share it with others. All new questions will be answered by Doctors online.