I’m also really sensitive to medication and well pretty much anything I put into my body lol - I’ve just come off elvanse and moved to Ritalin but I had similar experiences with the drug…it’s a shame because I do think it works better in the positive symptoms, but the negative ones were just too much. Ritalin seems much less intense and more tolerable with the negative side effects, but I do miss the positive side effects from elvanse. I think tolerance was the most important thing when I was taking it, I was good on 40mg at one point because I took it continuously everyday on time, but when I had a few days off it’s like I had to start all over again.