"i have been on phentermine for many months now doctored monitored i have lost almost 40 lbs.... but tolerance seems to build up and mg needs increased - i seem to be plateauing, overall great med for weightloss -- although i lost a job opportunity - even though i submitted all info to company and told them i would be flagged for amphetimine in drug screening they still wouldnt hire and i submitted complaint to americans with disabilities act, stop taking 6 days before pee test if trying to get a job."