I have not had a problem with Mestinon yet I take 60mg 4 times a day. I take one every 5 hours so far so good. Meta

Yes, generic Mestinon can cause diahreah. I take the generic Mestinon and had problems with diahreah. I now take a probiotic before I eat, then eat my meal, and then take the Mestinon. That has solved the problem for me.

That is tricky. Mestinon and cellcept (which I take both) work best for me, before breakfast. I'll have a boiled egg, fruit, meat, and a veggie in small portions. Because I get full easily. I snack on sunflower kernels or pumpkin seeds or something like them, I will make a smoothie, choose your poison, 🥰 more fruit, chopped veggies and a protein again small portions for dinner. I've been doing this for a fee weeks.
Also Check and make sure which foods not to eat because certain of them will inhibit absorption and u won't get the full effect.
Take meds before your meal time at most an hour but if u forget 2hrs after. Absorption is what you want so you can get the full effect of your meds.
I hope this helps you
Stay hopeful 😎

Taking my Prednisone and Mestinon just after breakfast.

I take 22 mg Prednisone every other day with breakfast as early as possible. I have been doing this since 1983 for ocular myasthenia.