Hi Josie.

I've been on mestinon for nearly 6 years, and although it does cause me diarrhoea, the vomiting was worse for me, especially when I was on the time-span. The only thing that has worked for me are probanthine tablets, I carry them where ever I go.
I also make sure I take them with food, otherwise they play havoc with me. I still have what I consider a "build up" of medications, and have to stay close to the toilet for the day, but these only happen occaisionally now.
Dont feel to badly about going back to bed, early on I use to get home from work, have a glass of milk for dinner go to bed, and if I wasn't working the next day would sleep til 10am!! No where near as bad now!!
I dont think mestinon makes me more tearful, I'm sure its the frustration of having MG, and having to cope with the loss of my "normal" life before!! and not being able to do everyday things.

hope this helps a little
take care
redtail