The main effect of the white flower snake tongue grass is to clear away heat and detoxification, diuresis and drenching, and its medicinal properties are bitter and cold. The main effect of astragalus is to strengthen the spleen and tonify the middle, raise the sun and lift the trap, benefit the guard and consolidate the surface, diuretic, and support the toxicity of the muscle. Generally speaking, astragalus is better used in water, has a good qi tonic effect, for some low immunity, sweating, fatigue, as well as low blood pressure and other conditions have a very good regulatory effect. But the white flower snake tongue grass is too bitter cold, easy to damage the spleen and stomach, generally do not do health care drugs.