Duration adderall (dextroamphetamine and racemic amphetamine): Regular Adderall lasts about 6-8 hours. The xr usually lasts 8-10 hours but everyone is different. How much food is taken with it, other meds and caffeine can affect the time is may wear off. Some people don't feel good when it wears off, like irritability. Vyvanse (lisdexamfetamine) is an alt med that can last longer for some.
Answered 5/8/2016
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