What is the best thing to do in the event of altitude sickness?
Wherever possible “go down”. But, if you are staying in Cusco, you may still feel the effects. The best advice is to sleep, take plenty of fluids and you could also try coca tea. The porters chew coca leaves wrapped around a black resin called llipta. When you are actually walking and active (especially on day two of the trail), this may help since it dilates the blood vessels and carries oxygen to the parts of the body that need it.
