Well if I was to have a can of coke or ice cream they wouldn't give me pancreas pain afterwards so I guess it might be to do something with the dextrose going straight to my brain which then causes my pancreas to play up I'm not sure.
Taking it every hour could have worked. I think the issue is lack of glucose, not glucose. Every hour means stability for the brain.
When the brain wakes up, it's glucose requirement increases compared to before.