Preventing Altitude Sickness: Tips for Machu Picchu and Cusco

Traveling to the Peruvian Andes is a bucket-list experience for many, but the thin air at high elevations can derail even the fittest traveler’s plans. Whether you are hiking the Inca Trail or taking the train to the citadel, understanding how to manage your body at 11,000 feet is vital. This guide covers specific medical advice, itinerary strategies, and local remedies to keep you healthy in Cusco and Machu Picchu.

Understanding the Elevation Profile

The biggest misconception about a trip to Peru is where the danger lies. Most travelers assume Machu Picchu is the highest point of the trip. In reality, the gateway city of Cusco is significantly higher and poses the greatest risk for Acute Mountain Sickness (AMS).

Here is the elevation breakdown you need to know:

  • Cusco: 11,152 feet (3,399 meters)
  • Sacred Valley (Urubamba/Ollantaytambo): Approximately 9,100 feet (2,792 meters)
  • Machu Picchu Citadel: 7,972 feet (2,430 meters)
  • Lima: Sea level

Most severe symptoms occur in Cusco. If you can handle the altitude in Cusco, you will likely feel much better once you descend to Machu Picchu.

The "Sacred Valley First" Strategy

The most effective way to prevent altitude sickness does not involve medication, but rather logistics. Most flights from Lima land directly in Cusco. Stepping off a plane from sea level to 11,000 feet causes a shock to the system.

Instead of staying in Cusco immediately, arrange a transfer directly to the Sacred Valley. Towns like Urubamba or Ollantaytambo are roughly 2,000 feet lower than Cusco. This difference is substantial regarding oxygen levels.

Recommended Itinerary Flow:

  1. Land in Cusco.
  2. Immediately take a taxi or van to the Sacred Valley (about 1.5 hours).
  3. Spend your first two nights in the Valley to acclimatize.
  4. Visit Machu Picchu (lower elevation).
  5. Return to Cusco for the final leg of your trip. By then, your body will have produced more red blood cells to handle the 11,000-foot altitude.

Medical Interventions and Prescriptions

If you have a history of altitude issues or want to be proactive, speak to a travel doctor before your trip.

Acetazolamide (Diamox)

This is the most common prescription medication for preventing AMS. It works by acidifying the blood, which stimulates deeper and faster breathing to increase oxygen intake.

  • Dosage: Doctors typically prescribe 125mg or 250mg to be taken twice a day.
  • Timing: You generally start taking it 24 hours before you arrive at altitude and continue for two days after arrival.
  • Side Effects: Be aware that Diamox is a diuretic. You will need to urinate frequently. A very common but harmless side effect is tingling in the fingertips, toes, and lips.

Sorojchi Pills

If you are already in Peru and need relief, look for “Sorojchi Pills” at local pharmacies like Inkafarma or Mifarma. These are over-the-counter capsules widely used in Cusco.

  • Ingredients: They typically contain aspirin (to thin the blood and reduce headache), caffeine (to constrict blood vessels helps with headache), and salophen (a pain reliever).
  • Note: If you are sensitive to caffeine or aspirin, avoid these.

Local Natural Remedies

Peruvians have lived at these heights for millennia and have effective natural ways to combat the symptoms.

Coca Tea (Mate de Coca)

You will find fresh coca leaves or tea bags in the lobby of almost every hotel in Cusco, such as the Palacio del Inka or Monasterio.

  • How it works: Coca is a mild stimulant. It dilates blood vessels and improves oxygen absorption slightly while fighting fatigue.
  • Usage: Drink it immediately upon arrival. However, avoid drinking it late at night as the stimulant effect can cause insomnia.
  • Important Warning: Coca leaves contain the alkaloids used to make cocaine. While the tea is not a drug in the narcotic sense, drinking it will cause you to test positive on a drug urinalysis. If you have a job with random drug screening, do not consume coca products.

Muña Tea

If you want to avoid coca, ask for Muña (Andean Mint). It helps specifically with digestion and nausea, which are common symptoms of altitude sickness.

Oxygen Supplementation

Many 4- and 5-star hotels in Cusco pump oxygen into their rooms or offer “oxygenated rooms” for an extra fee. Brands like JW Marriott El Convento and Belmond offer this service.

If you are staying in a hostel or Airbnb, you can buy a personal canister of oxygen called Oxishot at pharmacies and supermarkets. While it won’t cure sickness, taking a few puffs can provide temporary relief from a pounding headache or shortness of breath when climbing stairs.

Nutrition and Hydration Rules

Your digestion slows down significantly at high altitudes. What you eat during your first 24 hours affects how you feel.

  • Hydration: The air in the Andes is extremely dry. You lose water through respiration twice as fast as you do at sea level. Aim for 3 to 4 liters of water daily.
  • Avoid Alcohol: Do not drink Pisco Sours on your first night. Alcohol depresses respiration during sleep, which exacerbates low oxygen levels.
  • Carbohydrates: Eat a high-carb diet (rice, potatoes, pasta). Carbs require less oxygen to metabolize than fats or proteins.
  • Skip the Cuy: Guinea pig (Cuy) and Alpaca steaks are heavy meals. Save these for your last few days. Eat light soups (Sopa a la Minuta) for your first dinner.

Frequently Asked Questions

Does physical fitness prevent altitude sickness? No. Being physically fit does not guarantee immunity to altitude sickness. In fact, younger, fitter males are often at higher risk because they tend to overexert themselves upon arrival. The key is genetic susceptibility, not gym performance.

What are the symptoms of serious altitude sickness? Mild symptoms include headache, nausea, and shortness of breath. However, if you experience confusion, loss of coordination (walking like you are drunk), or a wet cough, you may be developing HACE (High Altitude Cerebral Edema) or HAPE (High Altitude Pulmonary Edema). These are medical emergencies requiring immediate descent to a lower altitude and hospitalization.

Is it hard to breathe at Machu Picchu? Most people find Machu Picchu much easier to manage than Cusco. At roughly 8,000 feet, the oxygen levels are higher. While you may get winded climbing the steep Inca stairs within the ruins, severe altitude sickness is less common at the ruins than in the city of Cusco.

Can children take altitude medication? Pediatricians can prescribe specific dosages of Acetazolamide for children, but you must consult a doctor. Children often have a harder time communicating their symptoms, so keeping them hydrated and watching for lethargy is critical.