It is not a weird or abnormal side effect. It is one of the most common side effects since it is an amphetamine drug which is a stimulant drug (speed). It should take about 2 weeks for the body to get used to the drug. Many doctors will start patients on about 10mg then work up to the desired dosage over a few months. that helps the adjustment. I actually missed the up effect after i got used to it. It helped me stay awake to study and get much done. but now it just helps me focus with out those side effects.

this side effect is why amphetamine drugs are very addictive. Addicts crave that up feeling. when their body gets used to the adderall, they up the dosage. very dangerous.

anyway, good luck with your adderall usage.