I have failed 5 consecutive drug tests for benzodiazepines at the clinic I attend. I have been getting these drug screens for nearly a year now and I normally fail for amphetamines and methadone (its a methadone clinic.) I have been taking dextroamphetamine, alltace, and minocycline since I started attending the clinic over 10 months ago. The only new medicine I've started taking in the last couple months was the concerta 36mg. The nurse at the clinic says that concerta wouldn't cause me to fail for benzos, which makes sense. I know what benzodiazepines are and definitely have not been taking any since the drug screens starting testing positive over a month ago. I really need to figure out why I keep failing them though. Anyone know what could be causing it?