I recently failed a hair stat for methamphetamine how is this possible when i have not used? could dextroamphetamine or wellbutrin cause this?

When did u use last.: Call the American Association of Medical review officers or ask them on line. Hair testing is fairly new in commercial drug tests. It can detect many months of drug use , depending on how much hair (length) Received . When was the last time the drug was used. Need to see your primary care provider for confidential help because your health is #1.