My husband went to his regular doctor a few days ago and comlained of problems focusing. He was given the drug, Nuvigil, to help combat sleepiness during the day hoping to help his problems with focus. After taking the drug, he experienced tingling in his fingers for the rest of the day. It was after hours, the beginning of a holiday weekend, so his doctor could not be reached to ask about this reaction. It concerned him as he thought it might be an indication of an undiagnosed heart problem. What sort of side effects have any of you had with this drug, and did it go away with continued use?