Objective To investigate the pharmacological effects of Bimin Tablets(BMT) on the histological changes of nasal mucosa of guinea pigs with allergic rhinitis(AR). Methods TDI was used to prepare the AR model among guinea pigs at first. Then, the modeling animals were randomly divided into treating group(TG) treated with BMT and controlling group(CG) treated with hismanal. By the end of experimental period, samples of nasal mucosa were taken from all the animals for morphological observation and histological comparison among them. Results Compared with that of controls, samples taken from TGshow...