The main pharmacological action is to relax vascular smooth muscle. Nitroglycerin releases nitric oxide (NO), activates guanylate cyclase, increases cyclic guanosine monophosphate (cGMP) in smooth muscle and other tissues, leads to dephosphorylation of myosin light chain, regulates the contractile state of smooth muscle, and causes vasodilation. Nitroglycerin dilates the arteriovenous vascular bed, mainly by dilating the veins, and its effect intensity is dose-related. Peripheral vein dilation causes blood to remain in the periphery, reducing the amount of blood returning to the heart and lowering left ventricular end-diastolic pressure (preload). Dilation of arteries reduces peripheral resistance (afterload). Arteriovenous dilation reduces myocardial oxygen consumption and relieves angina pectoris. It also has a dilating effect on the epicardial coronary artery branches.

Therapeutic doses can reduce systolic blood pressure, diastolic blood pressure and mean arterial pressure. Effective coronary perfusion pressure can often be maintained. However, when blood pressure drops excessively or heart rate increases, shortening diastolic filling time, effective coronary perfusion pressure decreases. Increased central venous pressure and pulmonary capillary wedge pressure, pulmonary vascular resistance and systemic vascular resistance are reduced. Heart rate usually increases slightly, which is probably a reflective effect of decreased blood pressure. The cardiac index may increase, decrease or remain unchanged. Patients with increased left ventricular filling pressure and peripheral resistance accompanied by a low cardiac index may have an increased cardiac index. On the contrary, for patients with normal left ventricular filling pressure and cardiac index, intravenous medication can slightly reduce the cardiac index.

It promotes protein synthesis, reduces protein decomposition, and promotes the proliferation and regeneration of normal liver cells. It has a good protective effect on liver cell damage induced by carbon tetrachloride, reduces glutamate aminotransferase, and promotes the recovery of diseased tissues.

It promotes protein synthesis, reduces protein decomposition, promotes the proliferation and regeneration of normal liver cells, has a good protective effect on liver cell damage induced by carbon tetrachloride, reduces alanine aminotransferase, and promotes the recovery of diseased tissues

It promotes protein synthesis, reduces protein decomposition, promotes the proliferation and regeneration of normal liver cells, has a good protective effect on liver cell damage induced by carbon tetrachloride, reduces alanine aminotransferase, and promotes the recovery of diseased tissues

It promotes protein synthesis, reduces protein decomposition, promotes the proliferation and regeneration of normal liver cells, has a good protective effect on liver cell damage induced by carbon tetrachloride, reduces alanine aminotransferase, and promotes the recovery of diseased tissues

Amino acids are the basic units that make up human proteins and enzymes. They are the raw materials for synthesizing hormones, participate in human metabolism and various physiological functions, and play a special role in life.

Amino acids are the basic units that make up human proteins and enzymes. They are the raw materials for synthesizing hormones, participate in human metabolism and various physiological functions, and play a special role in life.

Amino acids are the basic units that make up human proteins and enzymes. They are the raw materials for synthesizing hormones, participate in human metabolism and various physiological functions, and play a special role in life.

Amino acids are the basic units that make up human proteins and enzymes. They are the raw materials for synthesizing hormones, participate in human metabolism and various physiological functions, and play a special role in life.

Amino acids are the basic units that make up human proteins and enzymes. They are the raw materials for synthesizing hormones, participate in human metabolism and various physiological functions, and play a special role in life.

Amino acids are the basic units that make up human proteins and enzymes. They are the raw materials for synthesizing hormones, participate in human metabolism and various physiological functions, and play a special role in life.

Amino acids are the basic units that make up human proteins and enzymes. They are the raw materials for synthesizing hormones, participate in human metabolism and various physiological functions, and play a special role in life.

Amino acids are the basic units that make up human proteins and enzymes. They are the raw materials for synthesizing hormones, participate in human metabolism and various physiological functions, and play a special role in life.

Amino acids are the basic units that make up human proteins and enzymes. They are the raw materials for synthesizing hormones, participate in human metabolism and various physiological functions, and play a special role in life.

Amino acids are the basic units that make up human proteins and enzymes. They are the raw materials for synthesizing hormones, participate in human metabolism and various physiological functions, and play a special role in life.

Amino acids are the basic units that make up human proteins and enzymes. They are the raw materials for synthesizing hormones, participate in human metabolism and various physiological functions, and play a special role in life.

Amino acids are the basic units that make up human proteins and enzymes. They are the raw materials for synthesizing hormones, participate in human metabolism and various physiological functions, and play a special role in life.

Amino acids are the basic units that make up human proteins and enzymes. They are the raw materials for synthesizing hormones, participate in human metabolism and various physiological functions, and play a special role in life.

It has good antibacterial effect on various Gram-negative bacteria and Gram-positive bacteria. Its mechanism of action is to bind to the 30S subunit of bacterial ribosome and inhibit the synthesis of bacterial protein.

It can play a protective antacid and astringent role on the gastrointestinal mucosa, and can achieve an antidiarrheal effect by reducing intestinal irritation, preventing the body from excessive dehydration and water-salt metabolism disorders.