By The Airplane 1. The air quality on airlines is drier, and therefore, can affect those with allergies or asthma. While all domestic flights are now smoke-free, many international flights are not. If traveling abroad, sit as far away from the smoking section as possible. Those with food allergies should call ahead and order a special meal.
Most airlines are very helpful in providing special dietary requirements.
The higher the altitudes, the less oxygen, so always carry your ingestible epinephrine. This is no time to leave it behind. Avoid drinking caffeine, colas, and alcohol, as they dry out your nasal passages. Use a natural saline solution nasal spray on an hourly basis to keep nasal passages moist. Severe asthma sufferers may need additional oxygen, and should call the airline ahead of time so they are prepared with oxygen paraphernalia.