The main role of dopamine is, on the one hand, in the cardiovascular system and, on the other hand, as a neurotransmitter to transmit information. Dopamine is synthesized by complexine, including neurons in the brain or the adrenal medulla, to synthesize dopamine. After synthesis, it enters the bloodstream to strengthen the contraction of the heart and dilate the blood vessels of the abdominal tract and kidneys, which can strengthen the contraction of the heart muscle and dilate the surrounding blood vessels to increase the blood flow. Dopamine is used in treatments such as resuscitation of shock, heart failure or protection of the kidneys, and even in the use of bronchial asthma. In addition, dopamine is used as a neurotransmitter to help control movement, and is closely related to drug addiction, learning memory and brain aging.