Thanks so much for the links and information. I really appreciate it, I have been worried about this. I am definitely going to check the links out! I am on a very small dose and actually only take a half of a 10mg tablet twice a day. I do not crave a higher dose. I do not take it on the weekends...just during the work week. It has been a god send in helping me say on task...especially because I have noticed that my MG has been causing me some cognitive problems at times if I am stressed and extremely tired. This disease is a double edge sword...Unfortunately, I have to work full-time for my insurance to cover all of my MG care...but, I know that I need my rest and pace myself..so I also be fully functionable in my job.