Mike, I wanted to add that too much Mestinon can cause weakness, for me this weakness feels different from regular MG weakness. I had severe double vision from MG for about 5 months, it finally went away when I decreased my Mestinon dose.

My neuro did say that Mestinon can help with double vision but it often takes at least 6 months.

If your neuro approves it, maybe you can adjust your Mestinon to see what works best for you. I can only take 30 mg at a time. Taking a full pill (60 mg) of Mestinon causes double vision for me (and other problems).

I hope this helps.