Lisdexamfetamine
"I'm 23 and have tried just about every ADHD medication out there. I've been on Vyvanse for some time now and it's great! I have energy, I can focus at work and school. It lasts the entire day and then some. The only drawback is you won't eat. You'll be hungry your stomach will growl but you can't eat. Sleeping is tough because it's a stimulant so I was put on sleep meds to help. You might have a jittery feeling and increased heart rate at first. It takes about an hour or so to kick in but it's a fantastic medicine. It's also very powerful. All you gotta do is NOT take it past 2pm at absolute LATEST or you'll lie awake forever in bed. Eat prior to ingesting because you won't eat later. It's great, try it!"