can adderall expire?

all pharms have an "expiration date" to some degree, but all that occurs is the chemicals become weaker and weaker (in MOST drugs not ALL), so it might be a TINY bit weaker, but not very much different from when it was brand new

 

a year?

Take it, nothing should be wrong with it.

 

You're fine. You may want to keep it somewhere airtight though, in a cool dry place; that's the best way to keep pills, or most drugs for that matter.

 

all pills expire but they can still get you high

 

They should be fine. They may have lost some potency, but not much.