how long does it take for adderall to work in adults?
<answer> 1-2 hours. <context> But in general, how much Adderall is safe is up to 40 mg per day for children, and 60 mg per day for adults, more or less dosage depending upon physical tolerance to amphetamines.ow fast does Adderall work. Adderall reaches its peak level in the blood in 1-2 hours. At that point, Adderall has taken full effect. Sometimes people will crush and snort the powder from the tablets to try to get more immediate effects.