Gradual changes in altitude will help your body adapt to the low-oxygen environment and can reduce your chances of developing all forms of altitude sickness. People adapt at different rates, but there are four general guidelines for climbing above 10,000 feet that are practical for climbers to follow:
If you develop early signs of altitude sickness, you can keep from getting worse if you immediately stop ascending or if you descend.
Mild symptoms of altitude adjustment, such as headache, can be prevented or at least limited by taking ibuprofen.
If you have experienced high-altitude illness in the past and are planning to again go to high altitude, you may want to discuss with your doctor the option of taking a prescription drug. The ones used are acetazolamide (Diamox, generic versions) and the corticosteroid medicine dexamethasone (Decadron, generic versions). Acetazolamide can cause frequent urination and a metallic taste in the mouth. These drugs do not prevent serious forms of altitude sickness.
If you previously have developed HAPE, you may receive the oral drug nifedipine (Procardia), the inhaled drug salmeterol (Serevent), or both medicines for a future rise to altitude. These medications may stabilize the blood-flow pattern in your lungs.
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