"ive been on phentermine for one month now, and already i&#039;ve lost 10 lbs, but i still eat, just not as much as i used to. when i started i weighed 130, i know i know, &quot;your not fat&quot; but even the thin people have problem areas, and thats what i want to get rid of. im always on my feet i work 3 jobs. in the month that i have taken them, not once have i not been able to fall asleep, i have felt pretty moody though.if i dont take it i wake up with a pounding head ech."