I, like many other's have experienced being out of breath, for no reason. I was on nexium 40mg, for 4 months, and experiencing excessively dry mouth, not being able to control this problem even by drinking 2 litres of water a day. mabee the nexium has dried me up so much, but I've stopped taking it and after 3 days, no more out of breath problems, 52 y.old, not taking any other kind of med. exercising regularly, So anybody, can nexium bring upon this kind of problem?