I have been told by multiple neuros that the release of the timespan isn't reliable enough for day use, and have been cautioned to take it only at night. The concern is that it may not give you enough sometimes, and too much at other times. Maybe you've gotten a feel for that if you are jittery once after not having been. They gave it to me because I was waking up with weakness, and because of my apnea issues. They've told me that it will at least offer some coverage during the night so I wasn't waking up needing to take a Mestinon during the night.

You're not the first one I've heard being given timespan during the day - I just question the wisdom, knowing what my docs and research have told me. Of course, I've dealt with the MG and Mestinon enough to know when I need a lighter dose or a higher dose, so they let me do my own thing with it now.

Hope you're doing better today!