Asthma and Altitude

Asthma is a chronic lung condition that is characterized by difficulty in breathing. People with asthma have additional sensitive or hyper-responsive airways.

During an asthma attack, the airways become irritated and react by narrowing and constructing, causing increased resistance to airflow, and obstructing the flow of the air passages to and from the lungs.

It is doable that people with asthma are more likely to be affected by altitude sickness.

However, fit, healthy people with well-controlled asthma should have no problems coping with high altitudes whether that they ascend slowly and discern and accept their limitations, adjusting their medicine whether need be.

In freezing conditions, pressurised inhalers might not work properly. They should be warmed (e.g. in the hands) before use.

In addition, the conditions are high altitudes are often dry and cold, and these conditions tend to exacerbate and trigger asthma. People whose asthma is triggered by cold conditions might find that high altitudes are a problem, as the air temperature generally decreases at higher altitudes.

Also, climbing can be a very strenuous exercise and this might trigger exercise-induced asthma in some people.

However, people whose asthma is triggered by house-dust mites might find that their asthma improves, as the house-dust mite can't outlive at altitudes higher than ‘the snow line’.

People with asthma who fly directly into a place that is at high altitude will not have time to acclimatise and might experience problems. This should be discussed with a physician so that the altitude reached by aircraft should not pose problems for people with asthma.

The ideal thing to do is to discuss your trip with your physician several weeks in advance of your departure. This will grant time to work out a individualized asthma action plan for the trip. This might involve increasing your preventer treatment for several weeks before the trip to give the airways additional protection, or measuring peak flow while absent to determine how altitude is affecting your lung function, or even easy things like ensuring that you have enough medication and backup medication.

Asthma and Altitude: Conclusion

It is doable that people with asthma are more likely to be affected by altitude sickness.

It is also doable that asthma can become worse with altitude, particularly whether people ascend too swiftly or disregard their limitations.