"i am 19 and was diagnosed with adhd when i was in elementary school. i have had my fair share of add/adhd drugs that i have liked or disliked. for years i had been taking concerta but i felt like it didn&#039;t do much for me. my grades started slipping during my sophmore year in high school and i decided that enough was enough. so i did some research and started reading about vyvanse. my doctor didn&#039;t know much about it because it is a fairly new drug. i started taking 50mg of vyvanse when i was 18 and have seen nothing but positive effects. i went from a 3.0 to a 4.1 gpa. it only lasts for about 5-6 hours so my doctor perscribed 5mg of adderall to take. i have loads of studying to do. this drug is simply wonderful. the reviews are helpful."