"started taking phendimetrazine last tuesday opted to be part of a study that a friend of mine told me about. i&#039;m 5&#039;9, 144lbs - by no means overweight. yet, i was trying to shed just 10-15lbs to get back down to the weight i once loved and felt my best at. 2 a day an hour before meals. first day it suppressed my appetite and i was more than a little surprised - thought i hit the jackpot, as i am the queen of snacking throughout the day. 2nd and 3rd day didn&#039;t work as well as the first, 4th and 5th day worked good again. now i&#039;m on my 7th day and today it hardly worked. not sure what all the back and forth is about because i haven&#039;t done anything different. i will say that i&#039;ve dropped 4lbs in the past week, but i&#039;m also taking water pills."