"i&#039;m 17 now. been taking the medicine for maybe 3-4 years now. honestly, it&#039;s fantastic in what it does. better concentration, less impulsive, able to actually sit down and work, more control over my mood/emotions and its worth repeating less impulsive. but please know that because of this i also weigh 129lbs. i&#039;m 6 feet tall. this completly kills my appetite. i&#039;ve gone full 24 days without any real meal and hate it. i hate feeling my stomach in pain and feeling weak because i have nothing to fuel me but still my mouth stays dry and eating food becomes so non-instinctive that i have to force myself to go through the motions of chewing and swallowing. when off it, appetite is fine. great medicine, please be aware of the effects possible."