i have been coming up positive for cocain on my drug test, im currently takinghydroxyzine-25mg,quetiapine300mg,fluoxtine20mg,prazosin5mg,pencillin500mg,nasal decongestant,fluticasone propionate nasal spray,albuterol, how is this possible, my prescripitions papers say that i can have a positive urine and false lab test but not what for, please help. YYYY@YYYY