The dosage of Chasteberry decoction is 6-12 grams, and the exact dosage is subject to medical advice. Chasteberry is a kind of Chinese herbal medicine, sweet, bitter and cool in nature. This drug has the effect of nourishing the liver and kidney, and making the beard bright. In clinical practice, it is mainly used for the treatment of Yin deficiency and internal heat, dizziness, blurred vision, tinnitus, lumbar and knee soreness (a feeling of soreness and weakness in the lumbar and knee regions), and premature whitening of beard and hair. It should be prohibited for people who are allergic to chasteberry, and for patients with spleen and stomach deficiency (weakness and coldness of the spleen and stomach) and yang deficiency. The common decoction dose of chasteberry is 6-12g, the specific dosage is related to the type of disease, Chinese herbal medicines, etc., patients need to be strictly under the guidance of the doctor to use the drug.