OBJECTIVE:To optimize the ratio of glycerol in Chloramphenicol and Ephedrine Nasal Drops included in China's Hospitals Agents Norms.METHODS:By formula optimization and observation on clinical trials,the ratio of glycerol in Chloramphenicol and Ephedrine Nasal Drops was reduced from 300mL to 50mL.RESULTS & CONCLUSION:The Chloramphenicol and Ephedrine Nose Drops prepared in an optimized ratio of glycerol is of much less irritability,good transparency,good compliance in patients,more reliable efficacy,thus deserving to be popularized.