120mg amphetamine salts

i was prescribed this shit a couple years ago for my ADHD but i don’t take it anymore (been switched to strattera, which i don’t even take right now). anyways, i found them recently and i’ve tried to get some sort of high off of them twice and it hasn’t worked. i was told the active ingredients should still be fine, so i’m thinking i probably didn’t take enough. first time i snorted 22.5mg, second time i snorted 45mg. would 120mg be enough, even if i have ADHD? and could i take it all orally? i hate snorting this shit.

they’re small blue tabs btw. b 775 is what they say on them