上浒充通大 SHANGHAI JIAO TONG UNIVERSITY 1896 1920 1987 2006 H-R blocking c drugs 【Actions and clinical uses】 1.H-R blockage the first used to prevent allergic reactions or treat their symptoms,such as rhinitis,urticaria etc. notice:(inefficiency)allergic shock and bronchial asthma 1 2.Central inhibitions prevention of motion sickness and vestibular disturbances,nausea and vomiting of pregnancy.H1 -R blocking drugs 【Actions and clinical uses】 1. H1 -R blockage the first used to prevent allergic reactions or treat their symptoms, such as rhinitis, urticaria etc. notice: (inefficiency) allergic shock and bronchial asthma 2. Central inhibitions prevention of motion sickness and vestibular disturbances , nausea and vomiting of pregnancy