"i&#039;ve used phentermine twice in the past, prescribed to me by my pcp. i lost the desired weight but i was not told to diet and i rarely worked out which obviously attributed to me gaining all the weight back. i began working out on a regular basis in the last few months but did not change my diet. (i&#039;m hard headed, lol.) well i began losing inches but not lbs. and decided i needed a boost, so i went to see a weight loss doctor. i was prescribed phentermine and phendimetrazine. at 5&#039;10 and 259 lbs. i decided to follow the diet also recommended by the dr. which is pretty much the atkins with the exception of you being able to eat yogurt. so 5 days later i stepped on the scale and weighed in at 250 lbs! sticking to the script this time!"