Thanks! How interesting. No, I don't take Zantac (or any other medications at present) but I know it also has some potentially bad side effects in the area of movement disorders. I wonder what that's about. It must affect the production of acetylcholine in the gut as well?

I've never had any stomach problems since I had the diaphragm/hiatus hernia operation although from time to time I still take digestive enzymes if I eat the wrong foods..

I'm thinking the increased frequency has been to do with my stress levels although I still haven't figured out the light sensitivity problems though. I do have blue eyes so I'm very sensitive to our harsh sunlight here. I have prescription sunglasses but forget to wear them a lot of the time. I should try to remember and put them on when I go outside.

Thanks for the info and the site.