"i am completely satisfied with this medication.  i had a few side-effects the first 4 days (a bit jittery, headache, insomnia, constipation) but all but the constipation has passed.  i have been on this for 3 weeks today and am down 11.4 pounds.  i am thrilled with it as i had tried phentermine and had terrible side-effects and had to quit.  i am on about a 900 to 1000 calorie daily diet.  drinking lots more water and walking daily.  it gives me a good energy....i want to be up and doing things but not like hyperactivity.  it&#039;s been a great experience, so far."