erxian decoction + guizhi decoction

Erxian decoction + guizhi decoction is a combination of two traditional Chinese herbal formulas. Erxian decoction (EXD) is a well-known formula composed of six herbs, including Epimedii Folium (Yinyanghuo), Curculiginis Rhizoma (Xianmao), Morindae Officinalis Radix (Bajitian), Anemarrhenae Rhizoma (Zhimu), Phellodendri Chinensis Cortex (Huangbai), and Angelicae Sinensis Radix (Danggui)[2][5][7]. EXD is primarily used to tonify both Yin and Yang, nourish kidney essence, clear empty heat, and has demonstrated effects similar to estrogen in preclinical studies. It has been widely used for menopausal syndrome, perimenopausal depression, osteoporosis, irregular menstruation, and other conditions related to hormonal imbalance[1][2][3][4][5][7]. Mechanistically, EXD upregulates brain-derived neurotrophic factor expression in the hippocampus and modulates estrogen receptor activity[1]. Guizhi decoction ("Cinnamon Twig Decoction") is another classic Chinese formula traditionally used for harmonizing Ying and Wei Qi; it contains cinnamon twig as its principal ingredient but details specific to this combination are not available in the provided sources. The combined use of these two formulas would be intended to synergize their effects on hormonal regulation and systemic balance according to traditional Chinese medicine principles.