False Positive For Methamphetamines After Taking Prescribed Meds

I'm taking Naproxen Sodium/Anaprox DS,and Sulfameth/Trimethoprim/Bactrim DS, for an infection and Percocets for pain. Recently started using Sudafed for my sinuses, would any of these cause a false positive for meth?

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Based on my research, none of the drugs mentioned are "notable" for causing a false positive for meth:

Naproxen (Aleve) - false positive for THC, Marijuana
Anaprox - false positive for THC, Marijuana
Bactrim - may test positive for benzodiazepines
Percocet - will test positive (not false) for opiates

"The chances of you getting a false positive depends on the quality of the laboratory that does the testing. There seems to be about 1,200 of these labs in the United States currently testing for drugs. Less than a 100 of these meet federal standards and most of the individual states do not regulate drug test labs. The number of false positives returned range from 4% to over 50%, depending on the lab.

A concern here is that, if your company tests for drug usage, they are probably not required to use a certified drug testing lab, which means you have a greater chance of getting a false positive.

The list in the link below shows hundreds of products that AskDocWeb has been able to document as causes of a false positive drug test result."

Referenced from:
http:/­/­www.askdocweb.com/­falsepositives.html

According to the above information, there is still a "likelihood" that those said drugs can cause a false positive for meth.

I hope this helps!

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I'm posting back again, as I just located additional details on this topic suggesting that the new drug you recently started taking is to blame for the meth false positive

"SUDAFED - false positive for Amphetamines, Meth and Ecstasy"

If you did test positive for Meth, I think it would be of utmost concern to contact the lab or the company who processed the drug screening to get that re-tested.

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i have been given drug test and i have showed a false positive for suboxone i dont take it nor any other pills i dont take any drugs i am on probation and in rehab i am tested 10 times a month i cant do any drugs at all why would i fail for this suboxone i didnt even know what it was till i failed for it can someone tell me why i showed a false positive for this i only take ibuprofen for my headaches?

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