"so i started taking phentermine because i have bad knees and cannot exercise and without losing weight i can&#039;t have surgery for a knee replacement. i must admit i was very skeptical about this pill but so far so good. i am 41 yrs old and i started taking this pill august 28th 2017 and at that time i weighed 365 lbs and as of this morning sept 2nd i weigh 353 lbs. thats a total of 12 lbs in less than a week. it completely takes my hunger away and i do have the dry mouth but i will deal with that. i have cut my food in half as i feel full much quicker and i like that. so far so good. i do drive a school bus so loading and unloading wheel chairs is a work out by it self so i get some exercise just not like i would like due to my knees."