Objective:To study anti-allergic effects of Biyan oral liquid.Methods:The models of rat homologous passive cutaneous anaphylaxis(PCA)

rat's skull periost mast cell(MC)degranulation as well as guinea-pig anaphylaxis of nasal mucosa caused by antiserum

guinea-pig anaphylaxis induced of histamine-phosphate

the delayed-type hypersensitivity(DTH)of mice due to 2

4-dinitrochlorobenzol(DNCB)were employed to study the anti-hypersensitivity effects of Biyan oral liquid.Results:Compared with the control group

Biyan oral liquid could inhibit rat homologous passive skin anaphylaxis and guinea-pig nasal mucosa anaphylaxis

suppress the degranulation of MC in rats

raise allergy threshold induced by histamine-phosphate and curtail continuance of allergic effects.Biyan oral liquid could inhibit delayed-type hypersensitivity of DTH mice.Conclusions:Biyan oral liquid has the effects of anti-anaphylaxis.