I had to start taking fiber every day for another health problem, and it has actually made the diarrhea much better. I still get occasional stomach cramps but they're not as frequent or as intense as they were.

No... unfortunately they don't ever wear off or stop. The only thing I've found is that your body gets used to your usual dose, and that results in slightly less diarrhea. But it doesn't go away. And anytime you have to up your dose, well, you know it will get a bit worse. Get a script from your doctor for Imodium for that. As far as the other side effects, I've got nothing to offer you on those. It sucks, I know. I did learn that there seems to be several new medications out there...maybe it is possible to find one that works for you and doesn't give you as many side effects?

No pun , sometimes I go to the bathroom 3-7 times a day 3 on a good day , I use to go about every other day what a change❤

The side effects for me wore off in about a month of starting it.

I do not know if my light headed feeling is from the MG or could it be the Mestinon??