These are often prescribed for runners, sports injuries to joints, and
those suffering from arthritis.
Syva labs has recently reworked its Cannabinoid test and
claims to have eliminated this problem. But a Science magazine article (July 8, 1988) lists Ibuprofen as cross reactive. Under the new government guidelines THC testing levels will be reduced to 50 nanograms. Many more THC false positives can be expected in 1994.
Dristan Nasal Spray, Neosynephren, Vicks Nasal Spray, Sudafed, etc.