• Prevention of Altitude Illnesses
    Basically, there are two categories to prevent it, proper acclimatization and preventive medications.
1, proper acclimatization
   -Do exercises to keep you good healthy condition before coming to Tibet.
   -Avoid catching a cold
   -Make sure you did not have any serious problem with heart and lungs.
   -Less activities for the first several days in Tibet, walk slowly, drink more water.
   -Ascend to higher altitude gradually.
2. preventive medications
   -Hong Jin Tian, a kind of traditional Tibetan medicine, comes from Plant, you can easily buy the aqua distilled from the Hong Jin Tian plant.
   -Diamox (Acetazolamide), it allows you to breathe faster so that you metabolize more oxygen, thereby minimizing the symptoms caused by poor oxygenation. This is especially helpful at night when respiratory drive is decreased. Since it takes a while for Diamox to have an effect, it is advisable to start taking it 24 hours before you go to altitude and continue for at least five days at higher altitude. The recommendation of the Himalayan Rescue Association Medical Clinic is 125 mg. twice a day (morning and night). (The standard dose was 250 mg., but their research showed no difference for most people with the lower dose, although some individuals may need 250 mg.) Since Diamox is a sulfonamide drug, people who are allergic to sulfa drugs should not take Diamox. Diamox has also been known to cause severe allergic reactions to people with no previous history of Diamox or sulfa allergies.
   -Dexamethasone (a steroid) is a prescription drug that decreases brain and other swelling reversing the effects of AMS. Dosage is typically 4 mg twice a day for a few days starting with the ascent. This prevents most symptoms of altitude illness. It should be used with caution and only on the advice of a physician because of possible serious side effects. It may be combined with Diamox.