I am the 78-yr-old who has had mg 8 mo and is changing to a new neuro April 20. I have had terrible gastric symptoms for 2 weeks, plus extreme tiredness, plus drippy nose and earache from fluid (no infection) behind ear drum. I had been put on 1/2 to 1 tab 3 times a day. Three halves worked like a miracle at first. Then leg cramps and some abdominal discomfort, so pred was added: that I quit within 4 days. Tried to raise dose to full tabs, but soon went back to half tabs. Lately I tried 4 half tabs or 3 plus one whole. (Doctor doesn't give a d-.which I do.) I do not know if mestinon is cause of gastric problem or it is a result of PP-I I was left on for 4 years..Am trying herbal stuff for gastric and am thinking of heading back to half-tab doses, but after reading here wonder if a night-time half-tab should be added. mg is mostly occular now. Yes, I know you all are not doctors, but I can't get thru to any neuro for now.