There is no authoritative information on how long chasteberry can be effective in drinking, the less severe cases are about three weeks, and the more severe cases may need to take 1~3 months, or even vary. Chasteberry taste sweet, bitter, cool, to the liver, kidney meridian, the main treatment of liver and kidney Yin deficiency, dark eyes, dizziness and tinnitus and other conditions, with nourishing the liver and kidney, eyesight and hair and other effects. At present, there is no relevant authoritative information on how long chasteberry can be effective in drinking, it needs to be based on the actual situation. If the patient’s condition is mild, it is about three weeks; those with more serious conditions may need to take 1~3 months. Because each patient’s condition, physical fitness and other factors are different, so the specific time there is obvious individual variability, can not be generalized, the specific medication need to consult a doctor. If you need to use drugs, please under the guidance of a doctor, do not self-medication, so as not to delay the condition.