How to Deal with Altitude Sickness When Traveling to the Andes

Traveling to the Andes is a once-in-a-lifetime experience—spectacular landscapes, rich culture, and a profound connection with nature. However, one common challenge for visitors arriving from low altitudes is altitude sickness.

While it’s a natural and temporary condition, altitude sickness can significantly affect your trip if not managed properly. Fortunately, with a smart itinerary and the right preparation, you can prevent it and enjoy your adventure to the fullest.

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What is altitude sickness?

Altitude sickness, also known as acute mountain sickness (AMS), happens when your body doesn’t adjust fast enough to the lower oxygen levels found at high elevations—typically above 2,500 meters (8,200 feet) above sea level.

The most common symptoms of altitude sickness include:

• Headache
• Dizziness
• Nausea or vomiting
• Fatigue
• Loss of appetite
• Difficulty sleeping

Altitude sickness affects people differently. Even seasoned hikers and athletes can experience symptoms when ascending too quickly.

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How to prevent altitude sickness

1. Gradual acclimatization

The best way to avoid altitude sickness is to let your body adjust slowly. A smart approach is to begin your journey at moderate altitudes—such as Machu Picchu (2,430 m / 7,972 ft)—and only then move on to higher destinations.

👉 Visiting high-altitude areas around 3,800 meters (12,467 ft) after spending time in Machu Picchu or the Sacred Valley is ideal. This way, your body is better prepared and the chances of altitude sickness are significantly lower.

2. Stay hydrated

Proper hydration is essential. The dry air at altitude causes your body to lose fluids faster, and dehydration can make altitude sickness worse. Drink plenty of water throughout the day.

3. Eat light

Digestion slows at higher altitudes. To reduce discomfort, stick to small portions and choose foods that are easy to digest. High-carbohydrate meals are especially helpful in preventing altitude sickness.

4. Take it slow

During your first 24–48 hours at high elevation, it’s important to avoid overexertion. Light walks, rest, and mindful movement give your body time to adapt and reduce the risk of altitude sickness.

5. Use traditional remedies

In the Andes, coca tea has been used for centuries to ease the symptoms of altitude sickness. While not a cure, it may provide relief and support oxygen intake.

6. Oxygen and medication

For those who are especially sensitive or planning rapid ascents, carrying oxygen or using prescribed medication such as acetazolamide can help prevent or reduce altitude sickness. Always consult a healthcare professional before your trip.

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When is the best time to visit 3,800 m (12,467 ft) and higher?

Once you’ve spent time at intermediate altitudes like Machu Picchu or the Sacred Valley, your body begins to adjust. This is the perfect time to head to destinations situated at 3,800 meters above sea level or higher.

Many travelers make the mistake of going straight to high-altitude locations, which increases the chances of developing altitude sickness. A well-planned travel route is the key to avoiding unnecessary discomfort.

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Final thoughts

Altitude sickness is manageable with the right knowledge and preparation. You don’t need to fear it—you just need to respect the altitude and give your body the time it needs.

Let’s recap:

• Altitude sickness is preventable.
• Altitude sickness is treatable.
• Altitude sickness doesn’t have to ruin your journey.

The Andes are magnificent, and high-altitude experiences are among the most rewarding. Facing altitude sickness with awareness and strategy allows you to enjoy your adventure safely, fully, and with peace of mind.