When babies with rhinitis seek medical attention, many parents are confused as to how to use some nasal sprays and drops, in order to facilitate parents to master the use of the following: At present, nasal sprays or drops can be broadly divided into five categories: 1. 3. inflammatory mediator blockers (sodium cromoglycate, ketotifen); 4. vasoconstrictors (hydroxymetazoline hydrochloride, clozolin hydrochloride, ephedrine, etc.); 5. other categories.