Cinnamon as a traditional Chinese medicine is non-toxic, so there is no Huanglian can reduce the toxicity of cinnamon said. Cinnamon is pungent and sweet in flavor, hot in nature, and belongs to the kidney, spleen, heart and liver meridians. It has the effects of tonifying fire to support yang (replenishing yang qi in the body), inducing fire to return to the source (inhibiting the rise of fire evil in the kidneys), dispersing cold and relieving pain (relieving pain by dispelling cold evil in the body), and warming the meridians. Cinnamon is used for impotence and coldness in the uterus, cold pain in the waist and knees, asthma due to kidney deficiency, deficiency of yang (relative deficiency of yang affecting the head and face), dizziness and redness of the eyes, cold vomiting and diarrhea, and cold hernia and abdominal pain (acute abdominal pain caused by coldness in the internal organs and coldness in the external wind) and other conditions. Yin deficiency fire (deficiency of Yin essence in the body, the emergence of excessive fire) should not be served, bleeding tendency, pregnant women should be cautious. Cinnamon can replenish yuanyang, warm the spleen and stomach, get rid of accumulated cold, and promote blood circulation, and is good at warming and tonifying kidney yang (warming and replenishing kidney yang qi); Huanglian can clear away heat and dry dampness (clearing away heat and drying out dampness), diarrhea and detoxification (getting rid of fire and poisonous evils in the body), and is good at clearing away and diarrheal fire in the heart. The combination of the above two medicines, both cold and heat, together play the effect of diarrhea south and supplementing the north, transportation of the heart and kidney (the fire of the heart falls, the water of the kidney rises, and each other’s control). It is suitable for the treatment of palpitations (rapid heartbeat, often accompanied by panic), palpitation (rapid heartbeat, panic) and insomnia and dreamlessness, etc., which are caused by the lack of communication between the heart and kidneys (heart fire and kidney yin deficiency, dysfunction of the physiological functions of the heart and kidneys). Note that Huanglian is contraindicated in patients with deficiency of spleen and stomach (spleen and stomach weakness and cold), and should be used with caution in patients with deficiency of yin and fluid. Specific medication should be administered under the guidance of a physician.