The main ingredients of Cang Er Zi capsule are Cang Er Zi extract powder, Angelica dahurica extract powder, Xin Yi volatile oil, Xin Yi extract powder, Gypsum extract powder, ice tablet, menthol, Scutellaria baicalensis extract powder. The medicines in the formula are commonly used in the treatment of wind-heat nasal diseases, including allergic rhinitis, acute and chronic rhinitis, with remarkable therapeutic effects and strong targeting, and can be used by patients in need.　　Clinical pharmacological studies have confirmed that Xinyi, Angelica dahurica, CangErZi is rich in volatile oil, aromatic and open, can improve nasal ventilation and olfactory function, and antibacterial, anti-inflammatory, improve nasal mucosal blood circulation, reduce the role of vascular permeability, etc.; Scutellaria baicalensis on gram-positive cocci and negative cocci have a role in the killing; CangErZi, Mentha piperita, ice, Xinyi, Angelica dahurica on the cold and rhinovirus, etc. have an inhibitory effect.　　Cangguizi capsule formula of all drugs together, expansion of nasal mucosal capillaries, improve blood circulation, improve the disease tissue antibacterial, anti-inflammatory effect, at the same time can significantly reduce the serum LgE level of patients with allergic rhinitis, which proves that the efficacy of Cangguizi rhinitis capsule not only has the antibacterial and anti-inflammatory effect, but also through the immunomodulatory surface of the nasal mucosa play a role in the treatment.