Gastrodia elata （the tuber of an orchid） requires a fungus, Mycena osmundicola, to sprout the seeds, and Armillaria mellea mushroom mycelia incorporate into the tuber to maintain its maturation and growth. It prefers light （sandy）, medium （loamy） and heavy （clay） soils. Clinical trials for relieving the main symptoms of hypertension were conducted, with a dose of 1.0-10.0 grams daily of the pure compound （five active ingredients）. Normopress Capsules （250 mg/capsule, 0.5-2.0 grams daily） containing methyldopa were prescribed as a comparison. The results showed high effective rates （〉80%） for types of convulsions, including those that occur with tetanus, epilepsy, stroke, and headaches. In support of treating allergies, it alleviated headaches and general fatigue. It was helpful in clearing the heavy, congested feeling in the head described as the brain fag that accompanies allergies. It treated neurasthenia - weakness, nervous exhaustion and difficult concentrating. The necessity of Gastrodia elata cultivation to solve the rapid exhaustion of resourses was pointed out.
