Altitude sickness
Climbing mountains Ecuador

Altitude sickness while traveling in Peru, Bolivia and Ecuador

What you need to know while travelling on high altitude locations

When you travel to Peru, Bolivia, or Ecuador, you are likely going to travel at an higher altitude than your body is used to. One of the things you have to be prepared for while you travel to higher altitudes and/ or climbing mountains in Ecuador, Peru and Bolivia is altitude sickness or “soroche”.  The cause of altitude sickness is because on higher altitude there is less oxygen in the air around us and usually the air is drier. Our body needs to make more red blood cells to compensate the lesser amount of oxygen. For most people the process of acclimatizing to a higher altitude only takes a few days, but for some it takes longer and sometimes it doesn´t work out at all.

You can’t prevent altitude sickness and it is a strange kind of disease that everyone can get; no matter your age or even physical condition. To complicate matters, even the effects of high altitude sickness aren’t always the same. Some people already feel weak at an altitude of a 1000 meter above sea level, others only above the 3000 meter altitude. In general most people feel the first symptomes of altitude sickness when they are higher than 2500 meter above sea level and/or ascending more than 300m a day and sleep at this higher altitude. If you ascend to an higher altitude, but descend again, this usually gives less problems. More information about altitude sickness you can find on the Dutch websites of and Han Willems Han Willems is a Dutch doctor who specialices in altitude sickness with mountain climbers. He also helped me with information about altitude sickness when I worked as a tour guide. The information on this web page is a combination of information from the websites I previously mentioned, information from Han Willems and personal experiences while traveling with many different tourists through Peru, Bolivia and Ecuador.

Ice climbing on Cotopaxi VolcanoHow to recognize (high) altitude sickness/ Soroche?
For this you need to know that there are three important forms of altitude sickness:

The first and most common form of altitude sickness is: Acute Mountain Sickness (AMS)

These are the symptoms:

  • Having a light headache (which can become a heavy one);
  • Feeling dizzy after doing only a bit of exercise;
  • Feeling more tired and unusually weak;
  • Having nausea, feeling sick;
  • Having sleeping-problems.

Other symptoms on high altitude can be: a bit short of breath, the feeling that you get less air and also dehydration.

The second form of altitude sickness is when you ´collect´ liquid in your head and this starts pressing on your brain. It is called High Altitude Celebral Edema (HACE).

These are the symptoms: Usually you first get some of the symptoms from AMS and next to these you get: mental problems, trouble with thinking, calculating, talking, hallucinating and not being able to walk in a strait line. Some people can get HACE without getting first AMS.
If you have these symptoms you need to go down immediately (at least more than 300 m) and it is preferable to seek medical attention!

The third and most dangerous form of altitude sickness is when you get liquid in your lungs, called: High Altitude Pulmonary Edema (HAPE).

These are the symptoms according to a congress about this subject in Lake Louise: Usually, but not always, it starts with the symptoms of AMS followed by at least two of the next symptoms: coughing very strongly, total loss of strength, real short of breath and pressure on the chest. In combination with two of the following symptoms: un-usual sound coming from your lungs, get too less oxygen, your heartbeat rises a lot (mostly above 110 beats a minute in rest), you start to breath faster (mostly above 25 breaths a minute), your lips, nose, and nails are getting purple/blue!
If you have these symptoms you need to go down immediately (at least more than 500 m), you need oxygen and it is preferable to seek medical attention, they may give you nifedipine (Adalat).

When you travel through, of climb mountains in Peru, Bolivia and Ecuador, you will have to keep in mind that there is unfortunately still nothing that can really help to prevent altitude sickness.
But you can prepare yourself. Just keep in mind that if you have too much trouble with the altitude the best thing you can do is to descend at least 300 m or to an even lower altitude where you didn’t feel sick before.

Some tips that lower your chances to get altitude sickness:

Altitude sickness in Peru, Ecuador, or Bolivia and some things you can do to help your body getting used to the altitude. Please be informed that we from Fairtravel4u are not dokters and before you use any medication it is always best to verify with your own dokter. For questions in Dutch or English you can also send an e-mail to Han Willems:
The most important advise if you travel to higher altitude is that you keep yourself calm, especially during the first days. Again listen to your body, take your time and don´t rush things.
Drink enough and eat a bit saltier. Drink more than you usually do, because on altitude you don’t always notice on time that you don’t drink enough. Two things that can indicate that you don’t drink enough are; when your urine is darker than usual and your lips get dry. Drink about one liter more than usual a day for each 1000 m you ascend; depending on the exercises you are doing. Do not drink only water, especially when you go often to the toilet, this indicates that your body doesn´t absorb the water well enough. In this case you can put a bit of salt and sugar in your water, drink some fruit juices, or Gatorade (or other sport-drinks). In one ocasion one of our group members drunk about 3.5 liters of water from 7:30 am until 15:30 pm and at 15:45 pm she was lying in hospital. She had effectively dehydrated her body from the necessary liqued and minerals and needed to be on the drip for over an hour. Of course this doesn´t happen often, but it is better to be informed. When you are dehydratated, either from high altitude, or diarrhea, it is even better to not drink water yet, but first drink at least a liter of so called electrolytes. Alternatives to electrolytes can be Gatorade, ORS, fruit juices, ore even soft drinks with sugar, but without gas.

Other tips to stay healthy while traveling on high altitude, or climbing mountains in Ecuador, Peru and Bolivia

Climbing Chimborazo and altitude sicknessYou can use Paracetamol against a small headache (aspirine has usually more side-effects, but can be used if you prever). If the headache is too strong for Paracetamol, than you have to descend and/or find medical attencion.
Avoid eating meat (or even dining heavily) just before you go to higher altitude, especially when you don´t know how you will react on this. It takes your stomach more energy to digest meat at higher altitude, which leaves your body with less energy for getting used to the higher altitude.
Be more careful with alcohol, the effect is stronger on higher altitude, it also dehydrates and has invluences on your capability in making decisions.
If you smoke, try to smoke less. Smoking will cost you oxygen.

Sun; avoid too much sun. Especially on high altitude (like the Altiplano in Bolivia) the ultra violet light is much stronger. The strong sunlight in combination with a drier air gives a bigger possibility to get dehydratated.
Dextrose tablets or Coromida, a stronger version of dextrose tablets (in Peru) are no medicine but they do work a bit against headaches.
Try to eat more iron rich food, like spinach and other green vegetables (only worth it if you are really going to do some exercises). Also it is better not to eat any (red) meat, or just dinning heavily before going to higher altitude. Your stomach will need to use more energy to digest this food, and therefore has less energy left to get used to the higher altitude.

There is a medicine that´s called acetazolamide (brand name Diamox). This medicine can prevent the first symptoms of altitude sickness for example with lowering the sour level of your blood and it also work slightly positive on your breathing rhythem. Make sure you drink enough if you use this medications, because it will make you urinate more often. Ask your dokter about other side-effects before you use this medication. The general recommondation if you decide to use this medication is to take 2 times a day 250 mg, starting only one day before you ascend and to stop if you are one day at the highest altitude of your destination without problems.

The in South America very popular ‘Soroche Pills’ containe the same working ingredients as asprine, mixed with caffeine. It is probably better just to take Paracetamol instead.

If you have too much trouble with the altitude, again the only real medicine is to go back to lower altitude and give your body rest…


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