Weather & Climate FAQ Q. How do I know if I am suffering from altitude sickness? A. How altitude sickness affects you can range from mild to severe and occurs because less oxygen is reaching the muscles and the brain, requiring the heart and lungs to compensate by working harder. Symptoms of Acute Mountain Sickness (AMS) usually develop during the first 24 hours at altitude but may be delayed up to 3 weeks. Mild symptoms include headache, lethargy, dizziness, difficulty sleeping and loss of appetite. AMS may become severe without warning. Please consult your doctor before departure to ensure you have an adequate level of fitness and health. Q. What can I do to try to prevent symptoms of Acute Mountain Sickness? A. Drink extra fluids. The mountain air is dry and cold and moisture is lost as you breathe. Evaporation of sweat may occur unnoticed and result in dehydration Eat light, high carbohydrate meals for more energy Avoid alcohol as it may increase the risk of dehydration Avoid sedatives Altitude Sickness tablets are available to help prevent/ reduce symptoms, consult your physician for advice on whether these are suitable for you.