by Ray Bennet

Things to avoid on your journey before hand are ALCOHOL (sorry) FAGS(Jan) but Jan has walked at 5000 metres before on the Annapurna circuit I believe. The effects are breathlessness obviously less O2, headaches, vomiting, cannot sleep, cannot walk a straight line(test at low alt first) and of course the end result can be very nasty and the only answer is to descend. I am not sure how to say this but nasty means fatal.

By the way age and fitness are not necessarily any guide although you have a better chance of no problems when younger it proved that way in Tibet.More...