It depends. If you have health issues, you should check with your doctor before heading to high altitudes. You can also consider getting a prescription for altitude sickness medication from your doctor. Don’t worry too much because nearly everyone experiences a little altitude sickness. The lucky ones may have a headache for the first 24 hours, while others may endure several days of fatigue, nausea, and headaches. When up high, lay off the booze, limit physical activity, hydrate, drink lots of coca tea, suck coca hard candy, or chew coca leaves. If the headache persists, take an ibuprofen, hydrate some more, and sleep it off. Some hotels have oxygen, so don’t hesitate to ask for it. Many Hotels offer oxygen enrichment in the rooms to assist with the altitude.