"starting taking this 4 years ago. lost 20 lbs.  it works but if u take it too long you have terrible side effects. severe dry mouth, bad breath, wired, can&#039;t focus, constipation. i mentioned to the dr the side effects and he said he&#039;s never had anyone complain about any negative side effects. i also asked if i should only take the medication for a certain period of time and he said no. i guess he got his money so he didn&#039;t care.  i just went off it and have gained about 8lbs back but that&#039;s because you fall hard. you are tired all the time. like i said it works but i think i will try the eating healthy and exercise."