Pharmacology Action: Immune tonic, diuretic, lowers blood pressure, Qi tonic Astragalus is useful for the treatment of: Alzheimer's disease Chemotherapy support Common cold/sore throat Immune function Astragalus is the primary herb used in Chinese medicine to tone the immune system of the lungs. It is useful for conditions of immune deficiency that lead to spontaneous sweating. It is also used for spleen qi deficiency with symptoms of weak, low metabolism; Edema; And prolapse of internal organs, as it raises the spleen yang and qi. It can be used for qi and blood deficiency caused by loss of blood or after childbirth.