vyvanse how long does it take for the drug take effect
How long will Vyvanse's effect last? Depends how much you took, if you took 70mg probably 12 hours or so but if you took a real high dose like 140mg probably 18 hours maybe a little more. A little more kick to it than 5 hour energy.Lisdexamfetamine is a prodrug of dextroamphetamine.Amphetamine is a scheduled drug and if you do not have a prescription it is against the law to obtain or use. Rarely, amphetamine can cause heart failure and psychosis.isdexamfetamine is a prodrug of dextroamphetamine. Amphetamine is a scheduled drug and if you do not have a prescription it is against the law to obtain or use. Rarely, amphetamine can cause heart failure and psychosis.