Medical Questionnaire
Altitude Sickness occurs when people who are not acclimatised to high altitudes go quickly from lower altitudes to altitudes of 2,500 m (8000 ft) above sea level or higher.
Broadly, the level of risk is depends on the altitude you travel to, as well as the speed of your ascent:
Below 1,500 metres
Altitude sickness seldom occurs at this level or below.
1,500 to 2,500 metres
The risk of acute mountain sickness (AMS) starts to increase at altitudes above 2,000 m.
Above 2,500 metres
Ascending to heights greater than 2,500 m puts you at possible risk of AMS.