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Hypnotic drugs, which may exert their pharmacological effects by acting on the gamma-aminobutyric acid-benzodiazepine (GABA-BZ) receptor complex. They can selectively bind to the ω-1 receptor of the alpha subunit of the brain GABAA receptor complex.

This product is a non-sedating, long-acting tricyclic antihistamine and an active metabolite of loratadine. It can relieve symptoms related to allergic rhinitis or chronic idiopathic urticaria by selectively antagonizing peripheral H1 receptors. In addition, in vitro studies have shown that this product can inhibit the release of histamine from human mast cells. Animal studies have shown that this product is not easy to pass through the blood-brain barrier.

This product is an angiotensin II (Ang II) receptor inhibitor, which can inhibit the conversion of Ang I to Ang II, and can specifically antagonize angiotensin converting enzyme 1 receptor (AT1). Its antagonism to AT1 is greater than AT28500 times. It selectively blocks the binding of Ang II to AT1 receptor, inhibits vasoconstriction and the release of aldosterone, and produces a hypotensive effect. This product does not inhibit angiotensin converting enzyme (ACE), renin, other hormone receptors, nor does it inhibit ion channels related to blood pressure regulation and sodium balance.

This product is an aminoglycoside antibiotic produced by Streptomyces spectabilis. It has high antibacterial activity against Neisseria gonorrhoeae, and also has good antibacterial activity against Neisseria gonorrhoeae that produces beta-lactamase; it has moderate antibacterial activity against many Enterobacteriaceae. Providencia and Pseudomonas aeruginosa are usually resistant to this product; strains resistant to this product are often still sensitive to streptomycin, gentamicin, tobramycin, etc. This product has a good effect on Ureaplasma urealyticum, and is inactive against Chlamydia trachomatis and Treponema pallidum. 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.