How to Prevent Acute Mountain Sickness (AMS) on High Altitude Treks

Acute Mountain Sickness (AMS) is the biggest health risk on any high-altitude trek. It can affect anyone – regardless of age, fitness level, or trekking experience. Understanding AMS and knowing how to prevent it can literally save your life on the mountains.

What is AMS?

AMS occurs when your body fails to acclimatize to the reduced oxygen levels at higher altitudes. Above 8,000 feet, the air contains significantly less oxygen, and your body needs time to adjust. When you ascend too quickly, the symptoms of AMS appear.

Common Symptoms

• Persistent headache that does not go away with painkillers
• Nausea, vomiting, and loss of appetite
• Extreme fatigue and dizziness
• Difficulty sleeping (insomnia)
• Shortness of breath during rest
• Rapid heartbeat even while sitting

Prevention Tips

1. Ascend Slowly: Never gain more than 1,000 feet of sleeping altitude per day above 10,000 feet
2. Stay Hydrated: Drink at least 3-4 liters of water per day. Dehydration worsens AMS symptoms
3. Avoid Alcohol: Do not consume alcohol for at least 48 hours before and during the trek
4. Eat Carbohydrates: High-carb meals give you energy and help with acclimatization
5. Walk Slowly: Maintain a steady, slow pace. If you can talk while walking, your pace is right
6. Diamox (Acetazolamide): Consult your doctor about taking Diamox as a preventive measure starting 24 hours before ascending

The Golden Rule

If symptoms worsen, descend immediately. There is no shame in turning back. The mountains will always be there, but your health comes first. Our trek leaders are trained to identify early signs of AMS and will make the call to descend if necessary.

Emergency Protocol

All our treks carry a medical kit with oxygen cylinders, Diamox, and a portable altitude chamber (Gamow bag) for emergencies. Our guides are certified in wilderness first aid and high-altitude rescue operations.