Radix Astragali Traditional Chinese Medicine used this herb for night sweats, fatigue, weakness, loss of appetite and diarrhea. The modern pharmacological studies showed that Radix Astragali possessed immunostimulant,tonic (adaptogenic), hepatoprotective, diuretic,antidiabetic, , expectorant, and sedative activities. The portion of the plant used medicinally is the four- to seven-year-old dried root, collected in the spring.