How long does generic Adderall last?

Its hits you faster and probally a little harder, but then you have to deal with a big crash..hits you faster and harder but then it leaves you faster and harder like all a once, just take the 30mg orally then crush one up and eat like half the powder and later eat the other half taht way you have the timereleased hitting you little at a time then you have the straight 15 mg crushed up one hitting you all at once. snorting is way more addictive!! becareful