Fusidic sodium mycophenolate sodium, also known as brown, fusidic sodium, having a steroid skeleton narrow-spectrum antibiotic, fusidic acid derivatives for the species, the appearance is white crystal or crystalline powder, odorless, bitter, slightly hygroscopic, soluble in water, ethanol, chloroform-soluble and insoluble in the acetone, ether, benzene. Danish LEO Pharma successfully developed the trade name Siding legislation for the first time, mainly in the liver metabolism, and by the excretion of bile, almost without going through the kidneys, low toxicity, have antiseptic effect by inhibiting bacterial protein synthesis. It has good antibacterial effect for gram-positive bacteria, it has good resistance. At the same time, this product is still sensitive for penicillin, methicillin antibiotic resistant strains such as, it has no cross resistance for husband sildenafil between sodium and other clinical use of antimicrobial agents.