The effects of eucommia are tonifying the liver and kidney, strengthening the muscles and bones, tranquilizing the fetus, and treating kidney deficiency and lumbago, and fetal restlessness. Cortex Eucommiae is sweet in taste and warm in nature, its effects of tonifying the liver and kidney, strengthening the tendons and bones, and tranquilizing the fetus are used to treat kidney deficiency and various kinds of lumbago, fetal restlessness, habitual abortion, and it can treat lumbar and knee soreness and tenderness (a feeling of soreness and weakness of waist and knees), weakness of the limbs and rheumatism paralysis caused by deficiencies of the liver and kidney (weakness of the functions of the liver and the kidneys). It should be noted that it is contraindicated for those who are allergic to this product, and should be used with caution for those with yin deficiency (deficiency of yin and essence in the body and the appearance of hyperactive deficiency fire). This medicine should not be consumed in excess, as it may cause adverse reactions such as dizziness, fatigue, palpitations (rapid heartbeat, often accompanied by panic) and drowsiness. Other than that, its precautions are not clear. It is recommended to use the medicine under the guidance of a doctor, not blindly self-medication to avoid adverse effects.