"i have been taking phendimetrazine (bontril 105 mg) since sunday, for about 4 days.  the first day i was a little jittery and could not eat anything then i developed a very bad headache but after my body getting over the initial shock it has adjusted to the medicine.  i weighed in on sunday at 214lbs, today thursday i am 204. i have lost a whooping 10lbs ... i am so excited about this.  i am watching my diet and i work out like crazy doing boot camp, circuit training and cross fit training with my trainers.  i started to take the medicine because i was doing all that exercise and my weight was not going down but now the combination of the pill and exercise i am seeing changes.  i am 34 and 5&#039;1."