I LOVE GAVISCON BUT.....
It has to be the peppermint, and it has to be out of a really cold fridge.
my doc gave me the advance (which I think is the really thick one) and I made the mistake of not asking the chemist for peppermint so got aniseed and heaved everytime.
So I went back and got another one but peppermint.
As I said, keep it in your fridge it really helps and instantly gets rid of heartburn :-D