Hi,
A prescription drug called Diamox may help. It works by stimulating your breathing, so that you take faster and deeper breaths. It can be taken on a plane several hours before arrival or at the airport before departure.
However, Diamox is a powerful medication, so it's best to avoid it if you can. Side effects include increased urination and tingling of the fingers and toes; People with allergies to sulfa drugs should not take Diamox.
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