Some people also notice that even mild exertion makes them short of breath, and that their hands, feet and eyes look puffy. No one knows why, but some people are more susceptible than others. Unfortunately, you can't predict your vulnerability from sea level. The best strategy to prevent AMS is to give your body time to acclimate to lower oxygen levels. It causes deeper, faster breathing, which raises blood oxygen levels.
Some herbs can help, too.
None of the ginkgo group experienced symptoms such as headache, nausea and malaise, but 41 percent of the placebo group did. Ginkgo also reduced respiratory symptoms and circulatory problems to cold hands and feet. Hobbs says the usual dosage for reishi is three one-gram tablets, three times a day, or about a teaspoon of syrup a day. These herbs also enhance endurance and help cope with stress. Ginger eases headaches and has been proved to reduce nausea, including motion sickness.