OBJECTIVE:To prepare chlorpheniramine gel nasal drops and control the quality.METHODS:Carbopol 940 was used as emulsification agent,alcohol as dissolvent,triethanolamine as pH regulator,and propylene glycol as preservative.The hydrophilic gel was transparent.The first order derivative ultra violet spectrophotometry was used to measure the drug content of the gel.RESULTS:The gel was homogeneous,the average recovery was 100.75% , RSD was 1.4% .CONCLUSIONS:Results showed its quality can be controlle...