"this is my second post. i started taking phentermine on 9/14/10--my starting weight was 190 lbs. this morning when i weighed myself i was 174.2 lbs. that&#039;s about a 16 lb. weight loss in 2 weeks. i have also been exercising 4 times per week while taking the medication and watching what i eat (no carbs, no sodas--including diet and making sure i drink plenty of water.) the only side effects i&#039;ve had so far is the dry mouth and sometimes if i stand up too fast, i feel a little light-headed. i would like to get down to the 130 lb range and hopefully, if my results stay the same, i should get there soon."