dude i have been taking amphetamines for years and i still only need 10mgs addyIR(or 25mg vyvanse) to feel the effects, and 20-30mgs aderall IR (OR 60-90mgs vyvanse) to get geeked. in fact, today i took 30mg vyvanse with kratom, valium, and oxycodone; i feel actually really speedy at the moment. i think the kratom synergizes well with amphetamine; the intensity makes me feel as if i took 60mgs of vyvanse this morning instead of 30mg. amphetamines/cocaine/methylphenidate and their derivatives exponentially increase the euhporia (synaptic dopmaine levels) of opiates. i feel so faking good
my guess is if you are using adderall tabs (IR), start with 5-10mg. that will get you really really high and wont last as long as say 20-30mgs woul. the 10mg would last 8hours, and then you would come down, or atleast when i was an amp noob 10mg would last all day so 12+ hrs. even i took amp ( IR&XR adderall and vyvanse) early in the morning around 7-8am, and wouldn;t be able to sleep for 24+hrs without a benzo especially with XR adderall and vyvanse. the XR addy wasnt so bad when i learned how to crush up the beads, add water and drink to make the effects similar to IR Addy. however, if you take the 30-40+ mg of vyvanse expect to be awake for 24+ hours. hell, even with a benzo 30-60mgs vyvanse allows me to stay up to 5-7am to keep getting high. i just use vyvanse as a synergizer of opiates and to keep me from nodding out from oxycodone OR bupre, valium, hydroxyzine, and marijuana.