"i started on phentermine 37.5 on 9/19 today is 9/26 and i am down exactly 10 pounds. i did exercise 7 days for 1hour each since being on this medication.  nothing very strenuous.  i ride the bicycle and put it on interval training. i started at 279 and currently weigh 269.  target weight is 190. i do under 25 fat grams a day and try to target 1000 calories max. i&#039;ve unfortunately had a couple of cheat moments ughh and wonder what o would have lost if i didn&#039;t have those!  just wanted to share what adding exercise has done for me.  i want this weight off so i can be more mobile and play with my kids!!"