I take 60mg a day of vyvanse (lisdexamfetamine) 30mg at 9 then 30 at 1 with dexadrine at 5 pm the help the coming down affect but i find it's still not enough?

An adult dose of : Vyvanse (lisdexamfetamine) 70 mg. given in AM takes about 2 hours to start working and lasts 12-14 hours in most adults. If you are a rapid metabolizer, a dose of Adderall taken about an hour before Vyvanse (lisdexamfetamine) effects begin to diminish may carry you through. Another option is to add a non-stimulant adjunct like Intunive, titrating doses till you achieve optimal effects. After 4-6 weeks, its effect lasts 24/7.