Hi Phil, The last time I met with my gastroenterologist, I was describing my eating patterns which include, like you, a little ice cream in the evening because it calms my stomach. I also mentioned that if my stomach seem particularly irritated, I also took some Tum at bedtime. She said it makes sense that the calcium from ice cream and Tums would calm the stomach, at least temporarily, but that calcium also stimulates the release of gastrin from the stomach and small intestine. Gastrin is the hormone that is primarily responsible for stimulation of stomach acid. So, after the direct acid nuetralizing effect of the calcium is exhausted there is a rebound of acid production a few hours later. This rebound may coincide with these episodes of acid reflux in the middle of the night. She cautioned against a lot of calcium-based products in the evening.
I have to admit that I still have a little ice cream most nights because if I am going to have trouble with the type of reflux that comes up to my mouth and aspirates to the lungs it comes shortly after I go to bed, not in the middle of the night. However, at night if I do take an extra antacid I take Gaviscon instead of Tums now. I also take Prilosec 40mg.
I don't know if others have been cautioned on calcium products and rebounds of acid production in the night, but I thought I would mention it in case it seems worth trying. Rick