"i started taking phentermine 0n 06/15/09. i have been taking it every day but weekends. i take 15mg twice a day. when i started i weighed 365lbs. at 5&#039;8&quot; now it is 09/18/09. three months. i now weigh 309lbs. i lost 56lbs. i am ecstatic about this. there are some side effects and i think if i stay aware of them it will work fine for me. we&#039;ll see what happens. my goal is 200lbs. hope you all get to your goal weight."