"works better than concerta for adhd-ia for attentiveness as well as alertness. far superior to concerta in regards to affecting sleep. vyvanse doesn&#039;t keep you awake. also seems to contrast greatly to concerta&#039;s method of dealing with attentiveness. makes a less &quot;zombie-like&quot; state of concentration and lets you break task when needed. an added effect is that of a more positive sense of well-being; most likely attributed to its amphetamine-based nature.

the greatest advantage is the delayed release into the body. great for those whose metabolisms don&#039;t react well to adderall xr or concerta. only wished it lasted about two hours longer in the body, but adapting dose time is acceptable."