Less effects with non XR adderall?

[Nahbus]

So SWIM obtained 4x 10mg adderall pills. They seemed like they were wet, or the coating was sucked off (they were white, I believe they should be yellow. Thats what the pill ID says.)
Anyway, yesterday SWIM snorted one 10mg - had slight mood lift, loss of fatigue... nothing special at all. Later in the night he swallowed another 10mg with no effects.
This morning he snorted 20mg (the rest) of them with very subtle effects.
When SWIM takes a 20mg XR, though... he's striaght up WIRED for hours upon hours. This makes no sense to SWIM. 20mg released throughout the day rips him up, yet 20mg in one blow (no pun intended) doesnt do much?
What's the deal?
Could they have been tempered with? I mean, even if the coating was washed off, that wouldn't really do much to the pills, would it?
SWIM is pretty confused.

Reputation Comments on this post:

this thread is keepin swim on his toes. wonder why one works better for swiy!