After a few days to acclimatize in Lima, I flew to Cusco. This meant going from sea level to 11,200 feet or 3,400 meters above sea level in less than 2 hours. I was warned against altitude sickness and had taken Diamox to prevent this from happening. Normally, I wouldn’t want to take the medicine, but I didn’t have much time to get used to the altitude so I opted to take it. Part of my research on Diamox revealed that it also is prescribed for glaucoma, and since I have glaucoma, I called my eye doctor who helped me make the decision to use it. Initially, I was concerned about the side effects, none of which ever materialized for me.