Lisdexamfetamine
"I have been taking Vyvanse for 4 years now and I have been on the same dose of 30mg for severe ADHD. A lot of people have trouble staying on the same dose and need to increase because they get used to the drug. Just a tip: take as needed and when you feel the effects wearing off? Drink a one-shot espresso drink NOT an energy drink. Overall, if you are looking for a good ADHD medication I would recommend either Focalin OR Vyvanse. Best of luck!"