Xin Yi San (XYS, magnolia flower powder) reduces nasal symptoms in patients with perennial allergic rhinitis (AR) due to its diverse immunomodulatory effects. One hundred and eight Taiwanese patients with AR received either XYS or a placebo for three months. The investigators found that XYS attenuated the nasal symptoms of sneezing, rhinorrhoea and nasal congestion through reduction of nasal airflow resistance and increase in the...Weiterlesen