I can't answer your question because i'm on phentermine as well, but you lost 34 with it? Do you take it everyday ? I know you said that it's not working as well, but try only taking it on the weekdays. I started doing that and for some reason i think it's still in your body on the weekends so you don't eat as much, and by monday morning it's out. But it also tricks your body and makes it realize your not taking it everyday so when you do take it it still works just as effectively, I hope that helps in working with what you have since i can't help with the tenuate...