A selective b2-receptor agonist, it can selectively stimulate the b2-receptors of bronchial smooth muscle and has a strong bronchodilator effect. Its excitatory effect on the heart is smaller than that of isoproterenol.

1. It stimulates the contraction of uterine smooth muscles, simulating the contraction of the uterus during normal childbirth, causing the cervix to dilate. The uterus's response to oxytocin gradually increases during pregnancy and reaches a peak at full term. 2. It stimulates the contraction of mammary smooth muscles, which helps milk to be discharged from the breast, but does not increase the amount of milk secreted by the mammary gland.

This product is an organic iodide, an auxiliary therapeutic drug that promotes the absorption of pathological turbidity. It is absorbed slowly after injection, and most of it exists in adipose tissue and nerve tissue. It gradually decomposes into free iodine in the body and distributes throughout the body. It can promote the absorption of inflammatory exudates and other pathological deposits in tissues and the dissipation of chronic inflammation.

This product has two thiol groups, which can be complexed with metals to form non-toxic complexes that are not easily dissociated and excreted in urine. Dithiol compounds have a greater affinity for metals and can capture metals that have been bound to enzymes, thereby restoring enzyme activity. Since the complexes formed by dithiol drugs with metals still have a certain degree of dissociation, if the excretion is slow, the dissociated dithiol compounds can be quickly oxidized, and the free metals can still produce poisoning. Therefore, this product needs to be repeatedly administered in sufficient amounts in case of metal poisoning.

This product belongs to the aminoglycoside antibiotics, and its antibacterial spectrum is similar to that of gentamicin. It has antibacterial effects on Gram-negative bacteria such as Escherichia coli, aerogenes, Klebsiella, Proteus mirabilis, some indole-positive Proteus, Pseudomonas aeruginosa, some Neisseria, some non-pigmented Serratia and Shigella. The antibacterial effect of this product on Pseudomonas aeruginosa is 3 to 5 times stronger than that of gentamicin, and Pseudomonas aeruginosa that is moderately sensitive to gentamicin is highly sensitive to this product. Among Gram-positive bacteria, Staphylococcus aureus (including (lactamase-producing strains) is sensitive to this product; Streptococci (including Streptococcus pyogenes, Pneumococcus, Streptococcus faecalis, etc.) are all resistant to this product. Anaerobic bacteria (Bacteroides), Mycobacterium tuberculosis, Rickettsia, viruses and fungi are also resistant to this product. The mechanism of action of this product is to bind to the 30S subunit of the bacterial ribosome and inhibit the synthesis of bacterial proteins.