I recently has a tumor removed from my nasopharynx my doctor prescribed prescribed and I was given prescribed with prescribed to numb nose to allow the fiberoptic instrument to pass through my nasal passage with no pain. I recently had a hair drug test completed and I tested positive for cocaine when I have not used the drug. It shows my levels were 2644 pg/mg. Could Vicodine or Pontocaine cause the levels of the cocaine to be in my hair?