I take ADD meds every day now that it’s exam period and I have found that I get a reaction to adderall (my prescribed med). When I’m “coming down” my face flushes and I get a temporary rash. Same with dexedrine. I’ve tried some of my roommates rittalin and it fares with me much better. It works best for her too and she’s gluten intolerant. Not sure about vyvance, I’ve never tried it. This stuff is definitely hard on your gut and liver so I try to use it sparingly.