how to preserve adderall?

[sheaster107]

btw this is my first post! wooo! awesome forum, im glad to now be a part of it.

okay, so someone has a question. Basically, SWIM has over 500mg's of adderall and its XR that have been purchased over the past year from friends. Im a senior in highschool, but SWIM would like to be able to "perserve" his adderall for studying purposes for when he goes off to college next year....The expiration date says discard after 1 year, but is there anyway/tips to keep the adderall from expiring for the next year or so? and if so, about how many years after can i expect it to still work?

thanks everbody