Tetracycline antibiotics. This product is a broad-spectrum antibacterial agent with bactericidal effects at high concentrations. Rickettsia, Mycoplasma, Chlamydia, atypical mycobacteria, and spirochetes are also sensitive to this product. This product is more effective against Gram-positive bacteria than Gram-negative bacteria, but Enterococcus is resistant to it. Others such as Actinomycetes, Bacillus anthracis, Listeria monocytogenes, Clostridium, Nocardia, Vibrio, Brucella, Campylobacter, and Yersinia are sensitive to this product. This product has certain antibacterial activity against Neisseria gonorrhoeae, but penicillin-resistant Neisseria gonorrhoeae is also resistant to doxycycline. Due to the widespread use of tetracyclines over the years, common clinical pathogens have become seriously resistant to this product, including Gram-positive bacteria such as Staphylococcus and most Gram-negative bacilli.

Non-narcotic antitussive drugs mainly block the afferent sensory nerve impulses of the lung and pleural receptors, and also directly inhibit the antitussive center. It also has a papaverine-like smooth muscle spasmolytic effect

This product is a non-narcotic antitussive drug that mainly blocks the afferent sensory nerve impulses of the lung and pleural receptors, and also directly inhibits the antitussive center. It also has a papaverine-like smooth muscle spasmolytic effect.