"i started on phentermine 37.5 mg on 12/11/15.  5&#039;11&quot; 364 lbs.  at my first 30 day weigh-in after watching diet, eating 3 meals and 3 snacks a day, drinking lots of fluids (mainly water) and staying between 1200-1500 calories, i weighed 351.  i lost 13 pounds.  wow!  my next official weigh in is in 90 days and my doctor thinks i will be down at least another 30 pounds. i am also using the fit bit tracker.  i am slowly increasing my steps per day and adding everything that i eat or drink into the calorie counter.  this makes me more accountable."