Abstract: Liuwei Dihuang Pill is a representative prescription for nourishing yin and tonifying the kidney. It is composed of six medicines, namely, prepared rehmannia, Chinese yam, cornus officinalis, Alisma orientalis, Poria cocos and cortex moutan. Traditionally, it is used to treat dizziness, soreness of waist and knee, tinnitus, spermatorrhea, hand and foot...