Cefuroxime 1.5g The following steps are required to prepare Cefuroxime sodium skin test solution: Step 1: Take 1.5 g of cefuroxime and add 3 ml of sodium chloride injection to obtain 500 mg/ml solution. Step 2: Aspirate 0.1 ml of the dilution obtained in the first step using a 1 ml syringe and add 0.9 ml of sodium chloride injection to obtain 50 mg/ml solution. Step 3: Push out 0.9 ml of the solution obtained in the second step, and add 0.1 ml of the remaining 0.9 ml of sodium chloride injection to obtain 5 mg/ml solution. Step 4: Push out 0.9 ml of the liquid obtained in the third step, and add 0.1 ml of the remaining 0.9 ml of sodium chloride injection to obtain 0.5 mg/ml solution. (skin test solution). It is necessary to pay attention to the principle of asepsis and strictly follow the preparation procedure.