"i&#039;ve been using phentermine for 3 weeks and i&#039;ve lost 13 pounds with no exercise that being said i don&#039;t just sit around all day either. and i have not changed what i eat at all but it just makes me eat so much less and not be hungry. also listen to the label when it says eat afterwards. days when i took my pill on a empty stomach i felt tired and sluggish all day.  but once my stomach shrunk and i&#039;ve gotten used to my new eating habit i have no problems other then the dry mouth gives me bad breath so i&#039;ve been brushing like three times a day. also i&#039;ve been told that when you stop if you are not on a good diet and exercise schedule you will gain it all back.. just something to keep in mind...overall great product!"