Re: Amphetamines and Gastroparesis...
I've been on Adderall for ADHD, both before developing stomach issues and after. (I've had issues for 6 years, just diagnosed with GP.)
I found it irritated the gastritis and made me nauseous, much like coffee did. It can also dilate the LES and contribute to reflux symptoms.
Basically, see what coffee does to you, or caffeine pills. Caffeine and Adderall have pretty much the same effect on the body.