An example of a death in which Dex was implicated was Dr. Eberhard Schaaf in 2012 on Everest. Schaaf died on descent at the south summit from altitude sickness. It has a good reputation as a life saver, and is commonly given to Everest climbers for its ability to intervene in last desperate moments when altitude sickness sets in. For example, in the 2016 season Robert Gropel said he gave Dex to his wife (as reported by the Daily Telegraph) in attempt to save her as they tried to descend Everest. Dex is just the tip of the iceberg, with the UIAA noting the aforementioned dexamethasone, but also acetazolamide (aka Diamox), amphetamine, and alcohol use; and another noted Diamox (acetazolamide) use among trekkers. It is not really a matter of some authorities being for or against medications, but awareness, as misuse can cause drug interactions and various side effects. In particular it was noted that supplementary oxygen significantly lowers death rate on ultra-high altitude mountain climbing, and is generally not regulated as a drug, whereas the safe use of medications is less understood or even acknowledged in many cases. (see also: Effects of high altitude on humans)