The invention relates to a preparation method of
linezolid injection, which belongs to the field of pharmaceutical preparations. The preparation method of the
linezolid injection comprises: adding 400mL of water for injection, adding 2.3g of
sodium acetate trihydrate and 1.2g of
sodium chloride in sequence, placing it at a temperature of 0-5°C for 18-36 hours, and then Add 1.62g of
sodium citrate and 0.85g-1.2g of
citric acid in sequence, then add 50g of glucose, stir until completely dissolved to obtain a medicinal solution, add
activated carbon, stir and absorb at 60-70°C for 15-25 minutes, then decarbonize to obtain The first filtrate; add 2g
linezolid, 0.01g
sodium bisulfite and 0.03g aluminum
chloride to the first filtrate, stir and mix at 80-90℃, then add 50mL N-methylpyrrolidone, 10mL
dimethyl sulfoxide and Add water for injection to 1000mL, stir to make the liquid
medicine uniform, adjust the pH value of the liquid
medicine to 4.4-5.0, filter to obtain the second filtrate; fill the second filtrate to obtain the linezolid injection. The quality of the linezolid injection prepared by the method is stable, and the pyrogen is qualified.