i can't speak directly for the pharmacology of this but im pretty sure adderall/amp is a monoamine releaser for DA/NE/5ht(weakly) and cocaine is a DA/NE(I think...)/5ht(mild) reuptake inhibitor. these compete for overlapping areas and will likely either cause blunting or excessive PNS stimulation.
however in your case 10mg addy at 5pm should really not have any bearing on 11pm blow. I personally only did this once, took about 60mg or so of adderall about 1-2 hours before doing about a g of blow and drinking a bit...oh my god was that horrible. chest pains, tremors, anxiety, whole chest went numb and hypochondria sets in lol. space ur shit out and dont do too much amp if ur doing blow.
amp + mdma or cathinones seems to work just fine
amp + cocaine and piperidine (methylphenidate) both have resulted in nightmare experience that made me so grateful I had a handful of benzos with me each time. I never do stim stints like this without atleast a small amount of benzos or something to be safe and to make the tail end of the experience actually quite pleasant. benzos + amp are nice