Can I just tough out altitude sickness?

Mild symptoms yes, but don't ignore them. Severe altitude sickness can be fatal. If symptoms worsen after 2-3 days or you develop confusion/coordination problems, descend immediately.

Do the coca leaves actually help?

Coca tea provides mild relief for some people but won't prevent or cure altitude sickness. It's safe to try alongside proper acclimatization, but don't rely on it as your only strategy.

Should I buy oxygen in Cusco?

Most travelers don't need supplemental oxygen. Hotels and tour operators have it available if needed. Save your money unless you have specific medical concerns.

Is Lima high enough to cause problems?

No, Lima is at sea level. You'll only experience altitude issues when you fly from Lima to Cusco or other high-altitude destinations.

Can I take Diamox if I'm already in Peru?

Yes, but start with medical consultation. Cusco pharmacies sell it, but you want to understand dosing and side effects before beginning treatment at altitude.

How to handle altitude sickness in Peru

Arrive in Cusco 2-3 days before trekking, stay hydrated, avoid alcohol, and ascend gradually. Take acetazolamide if prescribed by your doctor. Descend immediately if you experience severe symptoms like confusion, difficulty breathing, or loss of coordination.

Arrive early and acclimatize. Fly into Cusco (11,200 feet) at least 2-3 days before any high-altitude activities. Spend your first day resting, walking slowly, and staying in the city. Avoid the Sacred Valley on day one — it's lower but the travel itself is taxing.
Stay aggressively hydrated. Drink 3-4 liters of water daily. Your urine should be light yellow. Avoid alcohol completely for the first 48 hours and limit it thereafter. Skip caffeine if it makes you jittery — altitude amplifies its effects.
Eat light and frequently. Eat small meals every 2-3 hours focusing on carbohydrates. Avoid heavy, fatty foods that are harder to digest at altitude. Coca tea helps with mild symptoms but isn't a cure.
Recognize mild vs. severe symptoms. Mild: headache, nausea, fatigue, dizziness. These are normal and usually improve in 24-48 hours. Severe: confusion, difficulty breathing at rest, loss of coordination, persistent vomiting. These require immediate descent.
Consider medication. Ask your doctor about acetazolamide (Diamox) before traveling. Take 125mg twice daily starting 1-2 days before arrival. Common side effects include tingling fingers and increased urination. Don't start it in Peru without medical consultation.
Plan your ascent carefully. Follow the 'climb high, sleep low' rule. If trekking, don't sleep more than 1,600 feet higher than the previous night above 8,000 feet. Take rest days every 3,000 feet of elevation gain.

Can I just tough out altitude sickness?: Mild symptoms yes, but don't ignore them. Severe altitude sickness can be fatal. If symptoms worsen after 2-3 days or you develop confusion/coordination problems, descend immediately.
Do the coca leaves actually help?: Coca tea provides mild relief for some people but won't prevent or cure altitude sickness. It's safe to try alongside proper acclimatization, but don't rely on it as your only strategy.
Should I buy oxygen in Cusco?: Most travelers don't need supplemental oxygen. Hotels and tour operators have it available if needed. Save your money unless you have specific medical concerns.
Is Lima high enough to cause problems?: No, Lima is at sea level. You'll only experience altitude issues when you fly from Lima to Cusco or other high-altitude destinations.
Can I take Diamox if I'm already in Peru?: Yes, but start with medical consultation. Cusco pharmacies sell it, but you want to understand dosing and side effects before beginning treatment at altitude.