And I have recently started back training a judo, a sport I used to do for many years, and I am thinking about trying out a competition which I haven't done for many years, which they used to do random drugs test in. I would to try it again but really worried in case I get drug tested and it comes back positive cos I know phentermine is an amphetamine and I don't want to get band from the sport and ruin my reprtation as a good sports person. And how long would I need to stop taking them for so it would not show up please. Can anyone help me with this ! Thank you.