How to Avoid Altitude Sickness in Cusco and Machu Picchu
Arrive in Cusco 2-3 days early to acclimatize at 11,200 feet before visiting Machu Picchu. Take acetazolamide (Diamox) starting 1 day before arrival, drink 3-4 liters of water daily, and avoid alcohol for the first 48 hours.
- Start Diamox before you arrive. Take 125-250mg of acetazolamide twice daily, beginning 1 day before reaching Cusco. Continue for 2-3 days at altitude. Get a prescription from your doctor before traveling.
- Plan your arrival schedule. Fly into Cusco and stay put for 2-3 full days before any high-altitude activities. Do not go straight to Machu Picchu. Your body needs time to adjust to 11,200 feet.
- Hydrate aggressively. Drink 3-4 liters of water daily. Start before you arrive and continue throughout your stay. Your urine should be light yellow. Carry a 1-liter water bottle everywhere.
- Eat light and avoid alcohol. Skip heavy meals and alcohol for your first 48 hours. Eat small portions of carbohydrate-rich foods. One beer at altitude hits like three at sea level.
- Rest on arrival day. Check into your hotel and do nothing else. Take a nap. Walk slowly. If you feel dizzy or nauseous, lie down immediately. Don't push through symptoms.
- Recognize serious symptoms. Seek immediate medical attention for severe headache, vomiting, confusion, or difficulty breathing. These signal serious altitude sickness requiring descent and medical care.
- Can I skip the acclimatization days and go straight to Machu Picchu?
- Not recommended. Machu Picchu sits at 8,000 feet, but you'll pass through 11,200+ feet in Cusco. Many travelers who skip Cusco acclimatization get sick on the train or at the ruins.
- What if I'm already taking medication for other conditions?
- Tell your doctor about all medications before getting Diamox. It can interact with blood thinners, diabetes medications, and some blood pressure drugs.
- Is coca tea actually helpful or just tourist marketing?
- Coca tea provides mild relief for some people, but it's not a substitute for proper acclimatization. Think of it as a small comfort measure, not a cure. The caffeine can help with altitude headaches.
- How quickly can altitude sickness symptoms appear?
- Symptoms typically start 6-24 hours after arrival. Mild headache and fatigue are common first signs. Severe symptoms like vomiting or confusion require immediate medical attention and descent.