"starting taking phentermine in march at 183lbs. by july i was 150lbs. i stopped taking phentermine the end of july. the only side effect i experienced was dry mouth, which wasn&#039;t a bad thing because the dry mouth just caused me to drink more water. i have been off phentermine for 1 month now. no withdrawals and down another 5 pounds putting my current weight at 145lbs. phentermine may not be for everyone but it was definitely for me because i look and feel great."