Altitude sickness is caused by rapid change in elevation without the adequate time for acclimatization. Most travelers only experience minor problems with the altitude. Shortness of breath is to be expected and headache, nausea, and loss of appetite are common symptoms.
To minimize or avoid symptoms:
It’s best to refrain from strenuous activity for the first couple of days you’re at high altitude.
Eat light meals and drink a lot of water.
Drinking coca tea is a local remedy for easing minor altitude sickness symptoms.
Some hotels offer supplemental oxygen directly into your room to aid with sleeping.
Over the counter or prescription drugs may also help, so please consult with your doctor before your trip to learn his or her recommendations.