Questions about False Positives in Drug Testing, page 275

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.

Pain clinic UA
Date: 3/5/2013
I go to a pain clinic and have to submit a UA every two wks. I currently take 5mg if ic amlodopine a say and 150mg of ranitidne twice a day. Every time I have taken an instant UA I test positive for Meth ans sometimes opiates, even heroin one time. I am prescribed Suboxone by the clinch, other than that I take nothing, could any of these meds be causing this false positive?


AskDocWeb: No, Suboxone (Buprenorphine) may test false positive for oxycodone (Reference: 54) but that doesn’t explain your test results. Your other medications would not show up on a urine test for drugs of abuse.

Date: 3/5/2013


AskDocWeb: Sorry Belinda, we can’t help you. This forum is for those who do NOT engage in illegal drug use.

Over-the-counter sleeping pills?
Date: 3/5/2013
I took a drug test and it came back positive for benzo,s But i am clean. I do taks alot of over the counter sleeping pill could that have done it?


AskDocWeb: It is possible, there are a couple of sources that say prescription sleeping pills may test positive for benzodiazepines on urine drug tests (See reference 3 and reference 20).

OTC Nasal Sprays
Date: 3/5/2013
I take nasal Spray’s for my constant stuffy nose. It contains phenyephrine HCL 1% and tested positive for Meth on a drug test. Waiting now and hoping the lab can show the difference in the two. So watch all products OTC any longer for they do not have to warn us the consumers you may look like a drug addict for using there product.


Blood test
Date: 3/6/2013
I rescenty had a blood test that that showed up positive for THC, Meth., and the last was amphetamines. I take stacker ten dietary supplement, also nyquil, advil, wal~act. Can they be the reason for the false test?

2. I also had roomates that would do drugs. Not in my rom. But there is vents. Could that be a factor too?


AskDocWeb: The updated list of all substances that are known to have caused a false positive on urine drug tests is here. Since we are not familiar with your “stacker ten dietary supplement” you may want to look up the individual ingredients for yourself. In our opinion it is unlikely that your roommates’ drug use would be a factor in your test results.

On probation
Date: 3/7/2013
I have prescriptions for hydrocodone xanax ambien insulin 70/30 and novolog loperimide metoprolol nexium phenegran cipro and amoxicillin and allegra i was sick and took day quil and nyquil and robitussin a-c and d-m and actifed c i also eat poppy seed bagels ans lemon poppy cke but my ua came back positive oxycodone hydrocodone and benzo can you tell me what may have caused this i am on probation


AskDocWeb: That seems to be an unlikely mix of medications as there are well over a dozen drug interactions possible if you are taking all of that. If you think that your test result was a false positive then get a GC/MS confirmation test to remove any doubt one way or the other.

Date: 3/9/2013
I have been testing positive for oxy and another time methadone. I am prescribed Lortab take 2 a day, Soma take 2 a day, Valium take 2 a day, Simvastatin and melatonin 3mg a day. It has to be the melatonin. Everywhere I read it says melatonin can’t cause false positives. I really believe it has to be the melatonin. Would a GC/MS straighten it out?


AskDocWeb: A GC/MS test will show if a substance really is in your system or not but it will not specifically identify what caused the false positive.

Date: 3/9/2013
I take methadone, tramadol, promethazine, Zofran, and valium as well as an ephedrine based asthma medicine. I also take Loperamide on occasion. Also Oxycodone prn My drug test came back and didn’t show the methadone or valium or tramadol or oxycodone but showed positive for morphine which I do not take. that doesn’t make any sense. What about poppy seeds. I have seen evidence for both sides. If it can cause a false positive for something can that be morphine?. ALso should I ask for another test? I think theirs is messed up as it didn’t detect anything other than the morphine but none of the other things that should show up on the test.


AskDocWeb: That does sound messed up. Poppy seeds contain both Morphine and Codeine and can cause false positives for opiates on urine tests. In order to remove any possible doubt, the test you need is a GC/MS confirmation test. And that needs to be done with the original sample.

Drug test for job
Date: 3/11/2013
I got last week a test for cociane, however it come back as positife, did not use anything for 15+ days, i know it is stupid, however the doctor told clearly i used 1 day ago, and i did not, not lying to myself either, only thing i use is Benadryl daily, should i continue doing a GC/MS or would it tell the same? i am reading benadryl is giving false positifes, but just finding clarification what a GC/MS test would say? i can not lose my job because of this and made the decision to stop cocaine, not easy but so far i am doing well.


AskDocWeb: The GC/MS test is used to confirm what is actually in your test sample. If there is no cocaine in that sample the result will come back negative.

False positive for benzos?
Date: 3/11/2013
Can lasix, atenelol, or zantac causr a false positive for benzos?


AskDocWeb: According to IT Laboratories, which is an ISO-certified drug testing and toxicology laboratory, ZantacĀ® (Rantidine) may test false positive for amphetamines.

Benzoic acid in Monster drinks
Date: 3/11/2013
I have a friend who drinks a monster or two every morning and has been taking rapid action energize pills. He just tested positive for Xanax on his drug test for CPA and hasn’t done any drugs for the past year or so. Can the benzoic acid in monsters give you a false positive?


AskDocWeb: No. Benzoic acid does not show up on a urine drug test.

Date: 3/11/2013
Will lipofuze cause a bad u.a. for methamphetamines? Due to the ingrideient Synephrine HCL.


AskDocWeb: LipoFuze is a combination of evodiamine, raspberry ketone, fucoxanthin, Coleus foskohlii extract, guggulsterones, black pepper extract, green tea, capsaicin, synephrine hydrochloride, 7-oxo DHEA, cinnamon, phenylethylamine, ginger, and 20-hydroxyecdysone. None of those ingredients are known to cause a bad urine drug test result.

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