Neurotransmitters are chemical substances that transmit information between neurons or between neurons and effector cells, and can be classified into cholines, amines, amino acids, peptides, purines, gases, lipids and other types according to their different chemical properties. 1, choline: mainly includes acetylcholine, which can specifically act on various choline receptors and has certain pharmacological effects on the cardiovascular system, gastrointestinal tract and urinary tract; 2, amines: amine neurotransmitters belong to the central neurotransmitters, common ones are dopamine, epinephrine, norepinephrine and histamine, which can excite the receptors of blood vessels to make them contract, and have a diastolic effect on the coronary vessels of the heart, often They are often used to relieve neurogenic shock, cardiogenic shock or infectious shock; 3. Amino acids: Amino acid neurotransmitters are amino acids with neurotransmitter functions, including glutamate, Y-aminobutyric acid and glycine, of which Y-aminobutyric acid and glycine are the main inhibitory neurotransmitters in the brain; 4. Peptides: Peptide neurotransmitters are neuropeptides, which exist in neural tissue and can participate in functional activities of the nervous system and are a special kind of information substance. When neuropeptides cannot be synthesized in nerve cells and cannot be released normally at synapses, it will prevent normal information transmission and trigger seizures; 5. purines: including adenosine and adenosine triphosphate, etc., which can protect neurons and glial cells and promote the growth or regeneration of neuronal axons in central nervous system injury and degenerative disorders; 6. gases: including carbon monoxide and nitric oxide, etc., which can only be released when the concentration of endogenous carbon monoxide is high enough. 6, gas: including carbon monoxide, nitric oxide, etc., only if the endogenous carbon monoxide concentration is high enough and the endogenous nitric oxide content is low, these two gas-like neurotransmitters can play a beneficial regulatory function; 7, lipids: including prostaglandins, neuroactive steroids, etc., different types of lipids on the central nervous system also have a certain enhancement and interference effect.