False Positive on Drug Test, page 165

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.

Failing a random drug screen
Date: 1/4/2012
I am part of a rehab program ordered by my job after failing a random drug screen which I in fact was guilty of smoking marijuana. Once I started the program I stopped smoking it altogether. But did have a stint of smoking synthetic pot while in the program until that was made illegal. I have stopped all forms of illegal drugs and managed to pass urine tests for over a month.

Last month (Dec 6) I went to the doctor for a severe sore throat and was put on Amoxcillin and Predinsone by my doctor and was taking BC Powders as well. Two days after going to the doctor (Dec 8) I failed only one urine test for THC. But I have had sporadic positives for synthetic since then but have not indulged in either of the substances. (First positive was Dec 12 for synthetic. Currently my last positive for synthetic was Dec 27 with some negative tests in the middle of those as well.) I seen on the list where NSAIDS can cause a false positive for THC but I cant find anything on false positives for synthetics.

This is important as the program I am in has to report to my job in order for me to stay employed and I have requested a GC/MS test by the program to confirm these as false positives but they are denying my requests. They are sending the tests to Redwood Toxicology which are using the RIA method to confirm these results. Can any of the medications I was taking have caused and would cause these results for synthetic marijuana? How can I prove my innocents if the program refuses to do a more accurate test? Please help!


AskDocWeb: Testing for synthetic pot is relatively new. Redwood Technologies Laboratories just started marketing their test in August of 2011. So far we haven’t seen any documentation on possible false positives with the new test. According to their website the new test accurately identifies JWH-018, JWH-073, JWH-081, JWH-250, AM-2201, RCS-4 and their metabolites. Tests are confirmed on advanced QTrap LC/MS/MS equipment providing definitive test results. Here is a list of the synthetic pot that their new test detects:

  • 2010
  • Bad 2 the Bone
  • Bayou Blaster
  • Buzz
  • Chronic Spice
  • Dark Night II
  • Diesel XXX
  • Dragon Spice
  • Earthquake
  • Fija Strawberry
  • Funky Town
  • G Four
  • Haze
  • K Royal
  • K2 Blonde
  • K2 Blue
  • K2 Citron
  • K2 Mellon
  • K2 Pink
  • K2 Standard
  • K2 Summit
  • K2 Blueberry
  • K2 Grape
  • K2 Legal
  • K2 Mango
  • K2 original
  • K2 Strawberry
  • Legend
  • Midnight Chill
  • Mr. Miyagi Zero
  • Mystery
  • Ocean Blue
  • Platinum Tiger
  • Pulse
  • S1. S Werve
  • Samurai Spirit
  • Shanti Spice
  • Spicylicious
  • Spike 99 Ultra
  • The original Cloud Nine
  • Triple Black Diamond
  • Tyranny Green
  • Vampire Blood
  • Warped
  • Who Dat
  • Wood Stock
  • XTREME Spice
  • Zombie World

On March 1, 2011 the possession and distribution of these synthetic cannabinoids became illegal in the USA.

False positive for meth?
Date: 1/4/2012
These are the meds I take; ibp, synthroid, estradiol, prometrium, cymbalta, xanex, lortab, metronidazole. Could any of these give me a false poss UA for meth?


AskDocWeb: Out of the 50 possibilities for a false positive for meth on urine drug tests, none of your medications is on the list.

Why didn’t it show up?
Date: 1/4/2012
I take a pain pill everyday my doctor said it did not show up in my urine test. Why?


AskDocWeb: There are a number of possible reasons for this:

  1. The drug was not taken as prescribed.
  2. Drinking an unusually large amount of water can dilute a test sample below the amount needed to show on a drug test.
  3. Some people metabolize drugs exceptionally fast and if the last dose was taken too long ago it might not show up.
  4. A small percentage of drug tests are faulty.
  5. If the drug you are taking has a very short half-life and if the last dose was taken too long ago it might not show up.

Hair follicle test result
Date: 1/4/2012
We had a hair follicle done and we were told that it showed “exposure” to Morphine6, Herion and oxycontin. The only drug we have taken is suboxone. Does suboxone, being an opiod, show a positive for morphine, herion and oxycontin? I am very confused about how it showed up. Any reliable information on this subject would help us greatly, as I can’t seem to find it online.


AskDocWeb: So far our research has been focused on urine drug testing. Hair follicle tests are generally thought to be more accurate but false positives are still possible. Hopefully this year we will have the time to get into that research but it really hasn’t started yet.

Cephalexin or Cheratussin AC
Date: 1/4/2012
Will the drug cephalexin 500mg and cheratssin ac syp cause false postive for cocaine?


AskDocWeb: No, cephalexin may cause a false positive on a urine glucose test but not a test for drugs of abuse. Cheratussin AC is a combination of codeine and guaifenesin. The codeine in it could test positive for opiates or oxycodone but not cocaine. However, if the test sample is sent for GC/MS confirmation, the result should come back as negative for oxycodone and positive for codeine.

Positive for THC
Date: 1/5/2012
My test came out positive and with high respones like I was smoking and since 02/12/10 I have not smoked. I take meds; adderall 20mg 2x a day, wellbutrin 150mg SR 2x a day, celexa 20mg once a day and vitamin d 50000unt cap teva once a month. What could be doing this to make my urine come out positive with response like I was smoking yesterday and I have not smoked since 2/12/10. I 190/ 200 pounds and 5’2″ tall and I smoke a pack a day of Newports 100’s, please help me. Am talking now meloxicam 15mg, Ritalin 20mg, aciphex 20mg, celexa 20mg, percocet 5-325mg, lasix 40mg and vitamin D 50000ui and once I stop taking percocet I started taking aleve, advil, aspirin, vitamin b, and motin, ibuprofen and came out with THC. I have to have my gallbladder removed. I have biliary colic and had two surgery’s in less then 4 month and 5x with anatesia. Please help me. I might be going to jail on 01/12/2012 if I don’t fine an answer to my question. My uterus was remove on Aug 16 2011 and rt hand and wrist surgery on 11/12/2011 I also take donnetal.


AskDocWeb: It appears that the answer that you need to stay out of jail would come from a GC/MS confirmation test. Several of the medications you take are known to cause a false positive for THC but the only way to show that is to get a confirmation test.

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