Altitude sickness can be prevented by

Some organisms possess adaptations that are physiological which allow them to respond quickly to a stressful situation. One experiences altitude sickness when one moves from plains to high altitudes. Its symptoms include nausea, fatigue and heart palpitations. This is because in the low atmospheric pressure of high altitudes, the body does not get enough oxygen. But, gradually you get acclimatised and stop experiencing altitude sickness. The body compensates low oxygen availability by increasing red blood cell production, decreasing the binding affinity of hemoglobin and by increasing breathing rate.