A 34-year-old male hiker ascended Mt. McKinley with a group of
experienced mountain climbers. At an elevation of 13,120 feet above
sea level he lost his appetite and felt nauseous and quite
fatigued. He attributed these symptoms to simply being tired from
the rapid pace of the ascent. However, the following day as the
group continued their upward climb, the hiker’s symptoms worsened.
He became dizzy and disoriented, and he lost his coordination. A
pharmacist in the group further noted that the hiker’s heart rate
was increased and his breathing was labored. It was decided that
the pharmacist would accompany the sick hiker down the mountain to
a lower elevation.