One of the eight essential amino acids for the human body, it combines with ATP to generate S-adenosine, which promotes the methylation of liver cell membrane phospholipids, reduces intrahepatic bile stasis, and enhances the transsulfurization effect, which is beneficial for liver cells to restore normal physiological functions, promotes the disappearance of jaundice and the recovery of liver function, promotes the synthesis of choline by supplying methyl groups, and promotes liver fat metabolism, liver protection and detoxification.

It combines with pyrophosphate in the body to form a cocarboxylase, participating in the oxidative decarboxylation reaction of pyruvate and a-ketoglutarate in sugar metabolism, and is necessary for sugar metabolism.

Penicillin has good antibacterial effect on Streptococcus such as hemolytic Streptococcus, Streptococcus pneumoniae and Staphylococcus that does not produce penicillinase. It has moderate antibacterial effect on enterococci, and Neisseria gonorrhoeae, Neisseria meningitidis, Corynebacterium diphtheriae, Bacillus anthracis, Actinomyces bovis, Streptobacillus candida, Listeria monocytogenes, Leptospira and Treponema pallidum are sensitive to this product. This product also has certain antibacterial activity against Haemophilus influenzae and Bordetella pertussis, and other Gram-negative aerobic or facultative anaerobic bacteria are less sensitive to this product. This product has good antibacterial effect on Clostridium, Peptostreptococcus anaerobic bacteria and melanin-producing Bacteroides, but has poor antibacterial effect on Bacteroides fragilis. Penicillin exerts its bactericidal effect by inhibiting bacterial cell wall synthesis.

It achieves bactericidal effect by inhibiting biosynthesis of sensitive bacterial cell walls. When used in combination with sulbactam, it has obvious synergistic effect.

It has an irreversible inhibitory effect on most important β-lactamases produced by β-lactam antibiotic-resistant strains, and can protect β-lactam antibiotics from hydrolysis and destruction by β-lactamases of resistant bacteria. When used in combination with cefoperazone, it has a significant synergistic effect.

It has good antibacterial effect on Escherichia coli, Klebsiella, Proteus, Salmonella typhi, Shigella, Citrobacter and other Enterobacteriaceae and Pseudomonas aeruginosa. Haemophilus influenzae, Neisseria gonorrhoeae and Neisseria meningitidis are highly sensitive to this product. It also has good effect on various groups of streptococci and pneumococci, and only has moderate effect on Staphylococcus aureus (methicillin-sensitive strain).

This product is an acid-resistant and penicillinase-resistant penicillin. Oxacillin has good antibacterial activity against penicillinase-producing Staphylococci, but its antibacterial activity against various streptococci and non-penicillinase-producing Staphylococci is inferior to penicillin G. Oxacillin exerts its bactericidal effect by inhibiting bacterial cell wall synthesis.