Prepare first, go slo. It is important to acclimate to elevation by lessening activity at the start.. Since oxygen levels are lower at elevation, we tend to hyperventilate to maintain oxygen levels. Use of acetazolamide a diuretic can be started prior to going to elevation to cause mild hyperventilation making acclimization easier. Hydration and avoidance of excess alcolhol prior to acclimating is helpful.