American ginseng slices are suitable to be soaked in water above 90℃, or boiling water. Radix Panax Ginseng is a qi tonic medicine, sweet in taste and cool in nature, with the effect of tonifying qi and nourishing yin, clearing heat and generating fluids. Compared with the effect of ginseng in tonifying qi, this medicine is more suitable for the symptoms of qi and jin injury caused by heat (deficiency of water and fluid due to too much heat). The temperature of the water should be high enough to bring out the effects of the medicine and it can be brewed repeatedly. Generally speaking, the tea is slightly bitter and has the aroma of American ginseng after it is brewed. Radix Panax Ginseng should not be used with quassia, and should be avoided in cases of deficiency of yang, obstruction of cold and dampness, gas depression and fire, and in cases of fire depression, and in cases of spleen deficiency with loose stools (thin and unformed stools). Specific use should be under the guidance of a doctor.