Hi all, I can definetely concur that ciclosporin gives flashes. Sometimes I get them in the back of my left thigh and its as if I have sat on something really hot that has made my leg too hot to stay sitting. I also have to take baths instead of showers for the sensitivity. Sometimes you get such bizarre effects that you could think you were going mad. I get muscle tremors when my leg decides to dance on its own or my fingers tap out a rhythm without my permission. I used to try to hide this when it happened but now I think sod it i'm ill, I will be a little bit weird. Good luck to your son, I have SAA/hypo MDS and I am on the same treatment. Hope his ATG works for him.