Quick Answer
Acclimatization is failing when symptoms of altitude sickness worsen, such as headaches, nausea, fatigue, and shortness of breath. Failure can also be indicated by decreased urine production, increased pulse and breathing rates, and a decrease in physical performance. Monitoring these signs can help identify when acclimatization is failing.
Identifying Acclimatization Failure
Monitoring urine production is a key indicator of acclimatization failure. At high altitudes, urine production typically increases to help the body eliminate excess fluids. However, if urine production decreases, it may be a sign that acclimatization is failing. Aim to produce at least 1 liter of urine per 24 hours above 8,000 feet.
Symptoms of Acclimatization Failure
Common symptoms of acclimatization failure include headaches, nausea, fatigue, and shortness of breath. These symptoms can progress from mild to severe, and in extreme cases, can lead to high-altitude pulmonary edema (HAPE) or high-altitude cerebral edema (HACE). If symptoms worsen or do not improve with rest and hydration, it is essential to consider descent as the primary treatment.
Treatment and Descent
Descent is the most effective treatment for acclimatization failure. Aim to descend at least 1,000 feet every 12-24 hours to reduce the risk of severe altitude sickness. If symptoms are severe, consider descending more rapidly, ideally at 2,000-3,000 feet per day. Take Diamox (acetazolamide) only under the guidance of a medical professional, as it can have side effects and interact with other medications. Always prioritize descent when acclimatization is failing, as it is the most effective way to prevent severe altitude sickness.
Find more answers
Browse the full Q&A library by topic, or jump back to the topic this question belongs to.