using tums with vyvanse imo and experience should be used a while after ingestion... u need your stomach to be acidic to cleave that lysine compound shit off... if theres no hcl in the stomach and GI tract, hydrolization won't occur as well I would think... thus slowing it down even more than it already is. Vitamin C won't affect the absorbtion right off the bat... but however if u ingest it, you will start to piss out the dexamphetamine quicker regardless... so its a fucked up lose lose, hit, but usually miss situation with vyvanse... fuck that garbage... unless you eat the same shit at the same times every single day, vyvanse is so unreliable... and metabolism plays a huge role....
pineapple and papaya i heard are good to ingest before vyvanse... as it has some enzyme things in a similar idea fashion as grapefruit does... not the same but same idea from what I heard... from BL long ago actually... someone I can't remember at the moment.... but it makes the hydrolized protein part of it occur faster.... so it makes it hit you a little more than it already does(n't) lol. im tired... sorry for confusing grammar and whatever you get it....
later.