An amphetamine , it affects different people in different ways , for instance children with a hyperactivity disorder will find the drug calming .
People who do n't have a medical need for the medication will get a stimulant effect .
An amphetamine , it affects different people in different ways , for instance children with a hyperactivity disorder will find the drug calming , while people who do n't have a medical need for the medication will get a stimulant effect .