Regarding the use of Provigil, my neurologist started me on it in Februay. While it is no miracle drug, it has improved mental clarity and mental fatigue, significantly reduced my headaches (which were almost constant) and ringing in the ears. But as I said, its not a miracle drug. My body still gets very fatiqued after even the slightest exertion. The first week was a little rough getting used to it. I would fall into a dead sleep around 6:00 pm! Apparently my brain wasn't used to be stimulated all day! The motor-agitation side effects were very mild and went away after the first week or so. I don't know if it is actually addictive or not, BUT when I went to the SSA for an appointment, I did not take any medicine that morning. I felt like I was out in left field!! I couldn't concentrate, I couldn't remember things, and I got a ticket driving home! As a former RN however, I would say that for me the benefits out weigh any side effects and I plan to stay on it!!