That's a dang good question and I would like an answer as well.
I too take amphetamine salts (10-20mg daily) and for about a month or so, SOMA at night (yes, I know can be very addicting), Prilosec as needed (for gastritis).
So in the morning an upper or two and at bedtime a downer...
You mentioned anxiety...did yours start a while after taking Adderall? It can be a side effect...took approx 6 months for mine to kick in... I've learned to deal with it and breathe when I feel anxiety coming on.
Suppose we could contact a pharmacist or two and see what guidance they might provide.
Zig