There are no false positives for THC as it occurs naturally only in cannabis plants. Prescription medications like sativex are the only legal synthetic sources of THC.
yes you can it blowzzz
Nothing can cause a false positive for THC.
Aleve has no traces of THC so therefore you cannot fail a drug test unless you smoke Marijuana
No ibuprofen will not show up as THC, ibuprofen will not even show up for a positive test