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.

It is a mild peripheral vasodilator, which is gradually hydrolyzed into niacin and inositol. It has the pharmacological effects of both niacin and inositol and has lipid-lowering effects. Its vasodilating effect is milder and more lasting than that of niacin, and it does not have the side effects of flushing and stomach discomfort after taking niacin. It can selectively dilate the blood vessels of the lesion site and the sensitive site stimulated by cold, but has a weaker dilating effect on normal blood vessels. In addition, it has the effects of dissolving blood clots, anticoagulation, anti-fatty liver, and reducing capillary fragility.

It is composed of multiple nucleotide molecules, can induce interferon in the body, has a good effect on diseases caused by various viruses, and can enhance antibody formation and stimulate macrophage phagocytosis.