Sleeping at 4500 meters

Up here you can´t breathe, you spin everytime you stand up. Your head feels like it is about to implode, and there is jack you can do about it. You no longer dare to chew as much coca leaves as you can fit in your mouth as you will soon need to sleep, and the leaves just keep you wide awake.
We are offered some wine but a sip proves to be deadly. The ten layers of clothes (no joke) restricts your movement so much that moving your arm tires you as much as running 2kms.
We are staying in a shack in the middle of the desert at 4500 meters above sea level. Mont Blanc is 4800 meters. It´s minus 20 and the beds are hell. All of us were stupid to think we would sleep a wink.
In bed we all lye in our clothes and paranoia sets in that you can´t get enough oxygen, as up here you are out of breath even lying still. Its a long night, but we all manage to laugh about it over coffee and the first round of coca in the morning.
Its all good practice for when we climb to 6060 meters in Peru in a few weeks time. With that trek you have to sleep at 5000 meters on the mountain in a tent!
WOOOHOO.