Single medicine chasteberry has no expectorant effect. It is recommended that patients who need to get rid of blemishes should consult a doctor in a timely manner and use medication under the guidance of a doctor. Chasteberry has the effect of nourishing the liver and kidney, clearing heat and brightening the eyes. It is mainly used for the treatment of lumbar and knee pain, premature whitening of hair, internal heat and thirst (internal heat accompanied by eating, drinking and urinating, etc.), night sweating (abnormal sweating after sleeping, waking up to stop sweating), spermatorrhea, dizziness, darkness and uncertainty of the eyes, forgetfulness and tinnitus. The adverse reactions and contraindications of Chasteberry are not clear. Note that patients with external wind-cold, internal cold injury, spleen and stomach deficiency, etc., should not take a large amount of a single medicine for a long time. If you need to use Chasteberry, you must use it under professional medical supervision.