"started on capsule 30 mg oct 15th, weight 215, 9 days on phentermine down 11lbs.  this pill works immediately.  the first day i felt energy without feeling jittery, i took it at 9am and now take it at 6am no later than 7am because it can keep you up at night.  if i take it early i am typically fine, if i feel a little wired before bed i just take a 5mg melatonin.  i drink a lot of water anyways so i don&#039;t get dry mouth bad but i did notice if i don&#039;t drink as much i can feel my mouth getting dry. it makes my mood happier, weird but i just have a feel good mood since taking this. maybe it&#039;s from the energy i feel that i am getting. i have nothing negative to say. it curbs my appetite amazingly, just make sure you do eat, don&#039;t starve yourself"