"so, i am on day 3. i started my weight at 167 and am 5ft 5in.  i am down to 165. thats a 2 pound drop in 3 days.  i like to add,  that the majority of the large weight loss at first is not fat... it&#039;s water weight. it&#039;s usually the first to go on any diet.  as for the phentermine, i feel great.  no major side effects.  i&#039;m not anxious, i&#039;m not moody, and my heart is not racing.  i&#039;m on 37.5 mg. i&#039;m also getting the lipoplex shot with b12. i am on a 1300 calorie a day diet (no sugars), and am exercising by walking 3 1/2 miles a day....  so far, my only complaint is sleep... i doze off, wake up, doze off etc.  last night i took melatonin and it helped a lot!  doc said it was okay to take.  look forward to seeing my results in 30 days."