Abstract
To the Editor: Johnson et al. (March 15, 1984, issue)1 make the point that the results of their carefully controlled trial of dexamethasone in the prevention of acute mountain sickness under laboratory conditions should be extrapolated cautiously to travelers in actual environments of high altitude. Nonetheless, after reading their article we could not resist the temptation to take some dexamethasone on a trip to the Peruvian Andes, "just in case." After seven days of acclimatization at 10,000 to 14,000 ft (3000 to 4300 m), we started a four-day ascent of Nevado Pisco (18,700 ft [5700 m]). On the second day . . .

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