Naphazoline hydrochloride nasal drops are mainly used for the treatment of allergic rhinitis and also for acute and chronic rhinitis. The main active ingredient is naphazoline, a derivative of azoline, which has the effect of directly agonizing the α1 receptor of blood vessels, thus causing vasoconstriction and reducing the congestion and edema caused by inflammation. Naphazoline hydrochloride nasal drops can be used clinically for allergic and inflammatory rhinorrhea, as well as for acute and chronic rhinitis to relieve the symptoms, and it should be noted that atrophic rhinitis and dry nasal cavity are prohibited when using this drug. In addition, it should be used in strict accordance with the recommended dose, the interval between doses should not be less than 4-6 hours, the course of continuous use should not exceed seven days, if you need to continue to use, you must follow the advice of the doctor. In conclusion, Naphazoline Hydrochloride Nasal Drops can be used to relieve nasal congestion and other symptoms caused by rhinitis, mainly to reduce the inflammation caused by congestion and edema.