"i am a 42 yr old woman.  i started taking phentermine on 4/26/2011. i take a whole pill. i have not noticed any side effects other than last night i could not sleep, but i have problems sleeping anyway. before i started taking this pill i exercise on the treadmill or bike for 30 mins a day or every other day. i eat healthy food. i never drink soda, i have always drank plenty of water. i am still hungry while taking this. i have only taken this for two days as of today. i will give this pill at least two weeks.  i am currently weighing in at 183lbs my goal weight is 145. i will write another review in about two weeks. lets see what happens. "