The side effects of Eucommia bark tea are not clear. Eucommia is sweet in flavor, warm in nature, and belongs to the kidney and liver meridians. It has the effects of tonifying the liver and kidneys, tranquilizing the fetal elements, and strengthening the tendons and bones. Cortex Eucommia can be used to treat lumbar and knee pain, dizziness, weakness of muscles and bones caused by deficiency of the liver and kidney (weakness of the liver and kidney), fetal leakage (small amount of vaginal bleeding in early pregnancy), and hemorrhage and restlessness of the fetus. Cortex Eucommiae is usually taken with decoction in water, and the active ingredients analyzed in tea are limited, so it cannot replace medication in treating diseases. The side effects and contraindications of Cortex Eucommiae are not clear. If you feel unwell, it is recommended that you go to the hospital in time and use Cortex Eucommia Ulmoides under the guidance of a professional doctor, rather than using it on your own.