I too carry Papaya Enzyme with me at all times just in case. I usually chew 4 at a time like my bottle says, but if I am really stuck and in a panic I have doubled it to 8. I also give these to my husband (not banded) when he has a tummy ache and it helps him more than tums or pepto bismol does.
I have also tried meat tenderizer when I'm stuck, but that stuff tastes awful and makes me feel worse. I haven't tried pineapple juice.