== == The best is slow acclimation. Go up a little at a time and get accustomed to the higher altitude over a few months. If you can't do that, take some oxygen bottles with you. == == Many people that fly or even go on cruises can get a feeling of nausea and especially when you are in the air, the odd person can even pass out. This is so simple it's ridiculous, but an old woman told me this .... put an ear plug in one ear! It works!