The use of Six Flavored Dihuang Pills for erectile dysfunction depends on the situation of each individual patient. If there are patients with weak erection caused by kidney yin deficiency, accompanied by weakness of the waist and knees, hot flashes and night sweats, etc., when there are obvious symptoms of yin deficiency, if accompanied by weak erection, taking Liu Wei Di Huang Wan for 1-2 weeks, or even up to a month, is very good for improving erection. If the erection is not firm because of other reasons, such as abnormal blood flow in the penis, varicose veins or androgen deficiency, then taking Liu Wei Di Huang Wan will not improve erectile function, so you have to look for the cause and the best way to solve the problem is to provide targeted treatment.