Adderall
"I'm 14 years old, and I've been on Adderall for 4 weeks now and I've experienced some side effects.  one of them would be loss of appetite especially in the morning and around lunch.  I've already gone from being 117 to 111.  That's not natural, my friend has the same problem too. I prefer Adderall though because my doctor told me that Vyvanse lasts for 12 hours and if you take it at 12 or 1 on the weekends, then you can't sleep till 12 or 1 in the morning. Adderall doesn't cause insomnia if you take it at 12 because it only lasts for 4-8 hours. Adderall really helps me pay attention in school, which is why I'm not failing out of my "College prep school". Totally recommend Adderall 100%."