These are those SOROJCHI pills which are commonly used for altitude sickness. Sur-gay from Bolivia said it was like drinking coffee and having caffeine in you so I am already looking forward to taking them. I wished I had this in Tibet 5 years ago. Cuzco is at 3300 meters above sea level and I can notice the lack of oxygen but La Paz, Bolivia is over 4000 meters above sea level. I bought some today and will use them for La Paz when I get there.