Does Benadryl cause false positives?

[frank23m23m]

subbing with wifes urine. She is totally clean but takes vitamins and benadryl for her allergies, could this cause a false positive?

[Burnt Toast]

False positives are eliminated when the sample goes thru the GC/MS for confirmation. The GC/MS can distinguish between illicit and non-illicit substances.

To avoid any hassles, find a source thats truly drug-free (including OTC and scripted meds).

Or consider the synthetic urine route. :thumbsup:

[frank23m23m]

I could get Quick Fix 5.7, but have read about some issues with the product in recent posts. I guess that some counterfit quick fix has hit the market, but I think that I can check the batch numbers.

Can anyone confidently answer the benadryl question, does it cause false positives or not?

[Burnt Toast]

I just answered your question concerning false positives. There are no false positives because they are eliminated when the sample goes thru the confirmation GC/MS.

To steer clear of QF counterfeit batches, order directly from the manufacturer, Spectrum Labs.