As a histamine H1 receptor antagonist, this product can counteract the capillary dilation caused by allergic reactions, reduce the permeability of capillaries, and relieve wheezing caused by bronchial smooth muscle contraction. This product has a long-lasting antihistamine effect and also has a significant central inhibitory effect, which can increase the effects of anesthetics, analgesics, hypnotics and local anesthetics. This product is mainly metabolized in the liver.

This product is an intermediate in the synthesis of Schisandrae Chinensis A, which can reduce liver damage and alanine aminotransferase (ALT) elevation caused by carbon tetrachloride; inhibit liver microsomal lipid peroxidation caused by carbon tetrachloride, its metabolic conversion to carbon monoxide, and reduce the consumption of reduced coenzyme II and oxygen in the metabolic process, protecting the structure and function of liver cell biomembrane; reduce the increase of liver ALT induced by prednisone, and promote liver regeneration in mice with partial hepatectomy; have a significant induction effect on cytochrome P450 enzyme activity, enhance the detoxification ability of carbon tetrachloride and certain carcinogens; improve protein metabolism in some hepatitis patients, increase albumin and reduce globulin. It has no negative conversion effect on HbsAg and HbeAg, and cannot shrink enlarged liver and spleen.

Dilate the coronary arteries, femoral arteries, and cerebral arteries, increase cerebral blood flow, strengthen blood circulation in the limbs, reduce blood viscosity, weaken vascular resistance, reduce myocardial oxygen consumption, improve cardiac function, enhance microcirculation, increase peripheral blood flow, change blood rheology, lower blood pressure, and improve heart rhythm

This product is one of the ingredients of the Chinese medicine bezoar. As an endogenous amino acid, this product is a central inhibitory transmitter that can regulate the excitability of nerve tissue and body temperature, so it has antipyretic, sedative, analgesic, anti-inflammatory, anti-rheumatic, anticonvulsant and other effects. In addition, it can improve the body's nonspecific immune function.