Questions about False Positives in Drug Testing, page 261

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 this forum is not for medical or legal advice.

Phentermine diet pill?
I get random drug screens at work, but I am on the phentermine diet pill. Will I test positive?


AskDocWeb: That does seem to be a possibility. Phentermine has shown up as false positive for Amphetamines and Ecstasy on urine tests (References: 3, 11, and 57). It is important to know that a GC-MS confirmation test will be able to tell the difference between the diet drug and a drug of abuse.

Drug tests sent to a lab
A faint line for benos showed up on drug test can u tell the difference between zanxs and valium when sent to a lab?


AskDocWeb: Yes, each has molecular characteristics that make them unique.

False positive for temazepan?
I used rivatril, oxazepan and valium but my drug test came back with temazepan also which I have not taken. Could these others have caused a false positive?


AskDocWeb: Some may cause a false positive but they are not known to cause one for temazepan.

In the U.S.A. rivatril is sold under the trade name Klonopin.

Tested positive for opiates, methadone, and oxycodone
I went to the er for an exam where they took a urine sample. I tested positive for opiates, methadone, and oxycodone? I am perscribed methadone, morphine sulphate, gabapentin, paxil, abilify, naproxin, clanzopam and methapheneldate.

I got finals going on so alot of stress. I get my menstral really bad so i eat pamprin like candy. I also get migranes and live on excedrine and tylenol. I have never had a problem testing at my pain clinic. So tell me what gives? The ER i went to is a hospital I work at so it means alot to me to clear my name.

As you can see I am perscribed enough and don’t need to take anything else. I don’t understand why this is happening. please help. ASAP. Also i never asked my pain doc what i come up positive for but than again i never neede to know before. thanks you and please help soon. I don’t want this to cost me my job. HELP!


AskDocWeb: As a general rule, any time that you get what you believe is a false positive drug test result, it is a good idea to get a GC-MS confirmation test. This will show exactly what is and what is not in your test sample. If you do have any false positives, that will rule them out.

Passion flower?
My fiance and I applied for a fiance visa. On his medical exam, the doctor gave him a urine test. In the interview, they said his test show trace of cannibis, and now they say he is ineligible b/c he is a drug addict section 212(a)(1)(iv). He takes ibuprofen for pain and herb passion flower for anxiety. I read ibuprofen causes false positive, but does passion flower? I need help with this nightmare.


AskDocWeb: Passion flower has not been documented to cause a false positive for cannabis but ibuprofen is known to do that (References: 1, 14, 16, 18, 20, 26, and 29).

Tested positive for benzos
I am on suboxone and ProAir albuterol inhaler, i tested positive 3 weeks in a row for benzos..i dont do this medication. i also get the deppo shot for birth control. could any of these or the combination of them cause a false positive? it is very important to me, as the results will be given to DHS so they can determine if im drug free…PLZ HELP!


AskDocWeb: Some of those have been documented to show up as false positives but not for benzos. However that doesn’t rule out the possibility of a false positive test result. In order to do that a confirmation test is required, preferably by an independent certified laboratory. For a list of SAMHSA certified laboratories see page 185.

Positive for benzos
I just had a drug urine test that came back positive for benzos. This also happened to me in November. I take Clonidine, Neurontin, Tramadol, Doxipin, Zoloft and Cardizem. Would any of these come back as a false positive? Thanks


AskDocWeb: The only one of those that might cause a problem on urine tests for drugs of abuse is the Zoloft, which may test false positive for benzodiazepines (References 31 and 33).

I tested positive for benzo after taking vistaril. will it show a false positive for beno?


AskDocWeb: Vistaril has not been reported to show up on urine tests for drugs of abuse as a false positive for anything.

Testing for CPS
I have a very good friend who drank all of the following different engery drinks in the same day: 1 redbull drink, 1 monster low-carb energy drink, and 1 screaming energy shot. She ended up testing positive for methamphetamine on a mouth swab and demanded another test, a UA test. It is for CPS and they say they can not tell if it’s negative or positive yet and are sending it to the lab. They told her not to worry, but she that is very hard for her not too when she is clean. She does not do meth. She lost 3 babies before because of it and is just getting them back, and they took her youngest baby today just for a test they said “not to worry about”……PLEASE HELP!?!?!?!


AskDocWeb: Please see the link for “What to do if CPS workers are investigating you” on page 169. There is some good advice there.

UTI or uri-calm?
Can a urinary tract infection cause a false positive for alcohol; also can uri-calm cause the same?


AskDocWeb: No, the only infection that has caused false positives on urine drug screens is kidney infection. Medications used to treat urinary tract infections do not show up in drug tests for drugs of abuse.

I failed a pee test for marijuana
Can you ease send me all of the medications that can throw a false positive for marijuana in a pee test and a hair follicle test? A company said I failed a pee test for marijuana but not the hair follicle test and I haven’t smoked pot since I was 16 and now I’m 25. Please help me.


AskDocWeb: The medications that might show up as marijuana in a pee test are detailed on the big list. There are about 70 possibilities. You should find it helpful to know that you didn’t fail the pee test until it is confirmed by a more accurate testing method. Hopefully that would be a GC-MS confirmation test by a certified laboratory.

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