2018 Updated Info: Read about Altitude Sickness in Peru & Bolivia in this informative blog post. How to avoid it, how to cure it, and more!

The Andes Mountain range is the longest in the world, spanning over seven South American countries, including Bolivia and Peru. They play a central role in local culture as well as attracting people from all over the world looking for beauty and adventure.

Because altitudes in the Andes Mountains reach over 9600ft (3000m) in Peru and Bolivia, they are also infamous amongst travellers for causing altitude sickness. The results aren’t pretty and if you’re not too keen on spending half your trip sick, it’s best to know a bit about altitude and how it affects us before heading into the mountains or Altiplano.

Quick Tip: If travelling to or from Lima Airport, it is strongly recommended to use the luxury Airport Express Lima bus to get to or from your hotel. Safer and cheaper than a taxi with no baggage limit as well as free Wi-Fi and USB chargers onboard, it is ideal for travellers.

Altitude Sickness Peru & Bolivia

When and where does altitude sickness occur?

Altitude sickness (or AMS – Acute Mountain Sickness) usually occurs above altitudes of 2,500m (8,000 ft) but some may already have light symptoms before reaching that altitude. When reaching altitudes above 3,600m (about 12,000 ft) severe symptoms might occur.

  • High altitude is an altitude between 1500-3500 metres (5,000-11,500 feet).
  • Very high altitude is an altitude between 3500-5500 metres (11,500-18,000 feet).
  • Extreme altitude is an altitude above 5500 metres (18,000 feet).

Altitude South America - Bolivia HopThe most common place to get altitude sickness in Bolivia is basically anywhere in the west. The capital La Paz lies at an astonishing 3640m (11942ft), making it the highest capital in the world and a trip to Uyuni will get you as high as 4500m (about 15,000ft) or more!

On the Peruvian side of the border, heights are more reasonable with Cusco at 3,300m and Puno at 3,860m making them some of the most elevated destinations. The Andes go right through the country dividing it into the dry climate in the west (Lima) and the Peruvian jungle in the east. Both sides are between 50 and 500m in altitude on average.

Elevation by city – Peru Elevation by city – Bolivia
Trujillo 34m 112ft Rurrenabaque 251m 823ft
Lima 50m 164ft Santa Cruz De La Sierra 416m 1,365ft
Iquitos 104m 341ft Sucre 2,790m 9,153ft
Puerto Maldonado 183m 600ft Cochabamba 2,790m 8,432ft
Nazca 550m 1,804ft La Paz 3,640m 11,942ft
Arequipa 2,380m 7,740ft Uyuni 3,656m 11,995ft
Machu Picchu 2,450m 8,040ft Oruro 3,766m 12,159ft
Ollantaytambo 2,790m 9,150ft Potosi 4,090m 13,420ft
Huaraz 3,052m 10,013ft El Alto 4,150m 13,615ft
Cusco 3,300m 10,800ft
Puno 3,860m 12,420ft


For information on booking a tour, comparing operators and reviewing prices we recommend to use FindLocalTrips.com a comparison website for tours and activities across South America.

What is altitude sickness?

Let’s say you are hiking up to Laguna 69 or maybe exploring La Paz for the first time. You look ahead at a simple staircase and continue to proceed ahead. If you would be climbing these steps in any other place, it would be a piece of cake, but you’re not – altitude makes this simple task more difficult. Each step makes you question if you’re really that out of shape. You feel as if you haven’t worked out a day in your life. Even worse, you see little locals and stray dogs walking up with ease while you need to take breaks to catch your breath.

Altitude Sickness Bolivia - La Paz

When you go to a higher altitude, the proportion of oxygen in the air stays the same but the air pressure reduces. Because of the lower air pressure the air gets thinner, which means there is less oxygen available in the same amount of air.

As a result your lungs have to work harder to receive the same amount of oxygen. This will make you breathe faster and deeper to get the oxygen into your lungs as you get less of it in each breath.

Normally your body needs a few days to adjust to this difference in air pressure. As you acclimatize, your breathing rate will normalize and your body starts making more red blood cells to help move the oxygen around.

So an increased breathing rate at high altitudes is completely normal and you shouldn’t worry too much about it. It’s important however that you take it easy on your body and give it a chance to adjust, in order to avoid additional symptoms. Typical symptoms of altitude sickness include: headache, loss of appetite, trouble sleeping, weakness, and/or dizziness and you might pee more than normal.

Altitude Sickness Peru

At extreme heights or without care, these symptoms could get worse and you are at risk of developing High-altitude cerebral oedema (HACO or HACE) in which the brain swells with fluid and High-altitude pulmonary oedema (HAPO or HAPE), in which fluids build up in the lungs. As both are dangerous and even lethal without treatment, it is best to avoid getting yourself in this situation altogether.


When travelling to elevated destinations you cannot underestimate the effects of high altitude on your body. It can happen to everyone and at any time. Here are a few tips on dealing with altitude sickness:

Coca Leaves/coca tea:

Although there is no evidence Coca leaves actually work, this is the most common advice you will get when travelling through Peru and Bolivia. Coca leaves are supposed to prevent the symptoms of altitude sickness, but not actually cure it. Whether it works or not depends on the people you meet. Some say it works like a charm while others claim it didn’t do anything to soothe their state. Either way, it doesn’t hurt, and since the Andean community swears by it, it’s at least worth a try. As an added advantage, Coca leaves make you feel less tired.

Chew them one at a time and store them in the side of your mouth against your gums. In addition, you can also have a little llijta (compounded of vegetal ashes such as quinoa and plantain) to help stimulate the coca.


Most problems usually occur when ascending too rapidly. If you are flying into La Paz -which has an elevation of 3,640m (11,942ft)- from a place that is basically at sea level, it is logical that your body will be under a lot of stress. In that case, take a few days of rest and especially avoid ascending more in that time. Therefore it is best not to fly into La Paz or most other cities in Bolivia for that matter. For Peru it is best to avoid flying to Cusco, Puno or Huaraz.

Altitude Sickness Peru

A far better option is to ascend at a more moderate rate so you give your body some well-deserved time to adjust to the situation. You can take a flight into the country that goes to a city with lower altitude like Santa Cruz De La Sierra in Bolivia or Lima, Arequipa and Iquitos in Peru. From there you should travel by bus to your destination. If you visit cities in Bolivia and Peru in -more or less- ascending order, you should be fine. At most, minor symptoms will occur.

When descending to lower regions you might find that you suddenly have superhuman stamina!! Out of experience we can tell that this effect only lasts about a day or three so enjoy it while you can.

Other prevention tips:

  • Breathe: Something so simple, but often people forget. In through your nose and out through your mouth.
  • Eat carbs: Fuel your body with carbs. Make sure you are always eating balanced nutritious meals throughout the day.
  • Stay hydrated: Drink lots of water and avoid coffee and alcohol.
  • Take it easy: Don’t overexert yourself. Intense physical exercise should be avoided at great altitudes.
  • Pills: Soroche pills (Diamox pills) – Make sure you take these at least 24hrs before your ascent.
  • Chlorophyll drops: Put some of these green drops into your water and drink this before your trip. These help build red blood cells as it is the same structure as haemoglobin with magnesium in the centre.

Dealing with altitude sickness

Although sometimes you have no other choice but to sit it through, there are some things you can do that help dealing with altitude sickness:

  • Descend: If you’re on a trek and you start getting a headache or have other symptoms, a good idea is to walk down a bit (if possible) so you can get more oxygen. After you feel better, gradually increase your altitude again. A 500 meter descent is advisable when symptoms get worse.
  • Rest: It makes sense to rest when you’re feeling sick. Altitude sickness is not to be underestimated.
  • Agua Florida: If you are feeling the symptoms of altitude sickness, this is highly recommended. Just take a bit and pat this on your face and you will feel it working in no time.
  • Pills: Dexamethasone – a steroid that decreases swelling in the brain. Consult your doctor before taking these as it is a prescription drug and can cause serious side effects.
  • Oxygen shots: If you are on a trek, you are able to take portable oxygen shots. In some hotels they provide oxygen tanks for people to use as well.

Altitude Sickness Bolivia

Facts about altitude sickness:

  • Fitness level plays no part.
  • It does not matter if you are male or female.
  • Age is not a factor.
  • Occurs when you’re not getting enough oxygen and therefore affects your lungs and brain.
  • Causes headaches, loss of appetite, trouble sleeping, feeling sick to your stomach, feeling weak or dizzy.
  • Feels like a hangover at first.
  • Most people can go up to 2500m or 8000ft without any problems.

The good thing about all of this is that if you are well prepared and understand what altitude sickness is, you will be able to overcome it all without trouble and you will manage to travel and enjoy the exceptional places that Peru and Bolivia offer travellers. Every mountain might seem extremely difficult as you make your way up to the top but you will get treated to amazing views and forget all else. Happy trekking!


To book a tour in Bolivia we recommend you use FindLocalTrips.com a search and comparison website for tours across all of South America.

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