I am well aware that one of my numerous weaknesses is not being able to handle heights. I am not talking about vertigo here but high altitude and the absence of O2. During our five years spent in the Bolivian highlands we realized that our family has two clear gene lines when it comes to live in high places. While I am pathetic, my wife does not bat an eyelid when it comes to highness.
While there we also had ample time to discern that the genes ruling altitude resistance are passed independently to your offspring. Our son inherited his mother’s altitude resilience while our daughter had the bad fortune of getting, among several of my bad traits, the one of very low altitude tolerance!
We were of course oblivious to this pairing until we arrived to La Paz in 2001. While my wife and son enjoyed a quasi-normal daily life, my daughter and I acquired a greenish skin tinge and felt sick most of the time until we reached a kind of equilibrium at 3,400-3,800 m in La Paz where we spent most of our time. The situation improved remarkably when we discovered that sleeping with a window opened increased the oxygen content of our bedroom although the temperatures decreased dramatically.
However, as soon as our travels took us to higher places such as Potosí at 4,070m our precarious balance got tilted in favour of the altitude and our discomfort would come back. It was enough for us to see the “Cerro Rico ” in the distance to start feeling unwell! Conversely and to our great annoyance, wife and son continued with their usual unresponsiveness to altitude!
During our recent trip to the Calchaqui valleys in Salta I had a “reliving” of that experience. We drove from our farm in the Gallinato (1,300m) to Cachi. This meant a climb to areas of higher altitude that crosses a really picturesque area and the road goes through a number of mountain passes and climbs to finally reach the Puna. On the way we passed through the Los Cardones National Park  (3,350m) to finally reach Cachi, a nice village in the confluence of the Cachi and Calchaqui rivers, located at 2,300m and framed by mountains, including the “Nevado de Cachi”  above 5,000m.
It was after the 180km drive, and parking the car at the hotel that I felt the start of my predicament and I had difficulties reaching the reception! The headache came without warning, suddenly and, although it was not the worst I had suffered, it was bad enough. Together with a general feeling of malaise comparable to that of a strong cold, it lingered on for the rest of the day and you could not ignore it. The combination was not conducive to enjoying my stay and by dinner time I felt truly dreadful!
It was time to consider the options at my disposal. Remembering old advice from Bolivia I decided to have a light dinner in the shape of a garlic soup (I could refrain from kissing my wife good night for once!). In addition, I discussed my predicament with the locals and they advised me to chew coca leaves -legal in these parts- as this would make me feel much better.
Of course I knew of coca, having supervised alternative development projects in Bolivia aiming at substituting coca growing for other forest-related activities. I am also aware of the controversy that surrounds the issue of coca and cocaine so I was reluctant at first. However, I had already seen large number of people “coqueando” in Salta so I decided to take the plunge and chewed the dose I was recommended to take: about four leaves! Regrettably, the only clear effect I noticed was that my tongue went to sleep before the rest of my body and I could not detect or see any advantage in the chewing!
Disappointed by the lack of reaction of my organism to the “hoja milenaria” I decided to cut my losses and retire to bed well before my companions. While walking to my room I went through the ABC of altitude sickness control: sleep alone, eat little, walk slowly and drink lots of water. It was then that I realized that the latter was the obvious cause of my trouble as, during the long drive I had –for some reason- not drank the water amount that I normally take.
I reached he room and drank as much water as I could hold. I also took one gramme of paracetamol for the now splitting headache and went to bed. Sleep came immediately and –luckily- the following morning I was as good as new. I returned the remaining coca leaves to the hotel management with thanks and I managed to feel well for the rest of the holiday and explore the attractions of the area in good health while drinking profusely to avoid being apunado again!
 In Spanish, someone with altitude sickness.
 Rich hill in Spanish. Potosí‘s landmark from where the Spaniards extracted tons of silver, activity that continues today.
 The park is named after the cardon cactus, Echinopsis atacamensis.
 Snowy mountain of Cachi in Spanish.
 Chewing coca leaves.
 Millenary leaves in Spanish, another name for coca leaves.