Thanks to all who have commented.
Provigil is not generally prescribed for ADD. Clinical trials showed it to be effective in the treament of ADD. I read that one child developed a rash that was thought to be caused by the Provigil leading the FDA to not endorse it for ADD. The doctor involved later decided that the rash was not related. It is sometimes prescribed off label for ADD.
What were you taking Provigil for? I am interested in trying it for ADD. The dexedrine and Addrall are both helpful with ADD. It sounds like Provigil may be a little safer in respect to heart health. I am not having any problems but one can't be too careful. I also have not heard of people developing a tolerance to Provigil as in the case of the amphetamines.