"i started taking phentermine on thursday(3-12-09) and as of today(3-16-09) i have lost 9lbs.  i have had a slight headache the last two days.  i have also had trouble sleeping.  i think i can deal with both of these things because they aren&#039;t unbearable.  i started at 268lbs and want to get to 190lbs. i&#039;m 5&#039;10&quot;."