3. Diphenhydramine
Diphenhydramine is one of the drugs that contain Phencyclidine (PCP) and may cause false positive on a drug test. Kinda scary that the antihistamines we use on bug bites and poison or to alleviate allergies and cold symptoms are one of the more common drugs that may cause a false positive for phencyclidine on a drug test. Dramamine; Unisom; BENADRYL! Yeah, you know the ones. Turns out, even though a false positive on a drug test is less common than you would think, these drugs are of the more common ones that will give you those phony results. Why you ask? Well, as mentioned before, other than the simple fact that accidents happen, the real reason behind what it is that causes false positives in drug tests is unknown. BUT (and there is a but!), there is a pretty good hypothesis behind it. THAT, you will have to read on to find out! What? I don’t wanna give away the secret just yet!
