"i have 3 kids. i&#039;m 26 and weighed 172 when i started phentermine 15mg 8 days ago. i went for my first weigh in on wednesday  (day 6) and was down to 167. 5 lbs in 6 days. my goal is 140. i had energy surges the first 3 days and that faded but i don&#039;t feel tired all the time like i used to. i am also on an antidepressant and have noticed if i forget it the next night the phentermine will make it hard to sleep. i started exercising more and it&#039;s a lot of work to even eat 1000 calories a day because i&#039;m not hungry but i do special k shakes for breakfast and small lunch and dinner. so far i love it."