I changed ADHD stimulant medication during the winter, and the weirdest part of that change was experiencing raynaud's syndrome for the first time. (Temporary, only when I'm on Vyvanse it seems) Temperatures I have never even considered chilly, like ~17-20 degrees, indoors with socks on, and suddenly, bam my feet and sometimes my hands are white and numb.<p>I really feel for you dealing with that on a regular NON-temporary basis. The pain as you get feeling back is awful, the unpredictability around it is awful, having to balance that with other CNS issues must be doubly awful. It really does seem like we're starting to understand the nervous system a bit more though, so there will be some breakthroughs in the near future!