“…This herb has been used for many diseases since no signs of toxicity or serious side effects were known in antiquity (24) . The role of herbal medicine in allergic rhinitis as an effective therapy has not been studied extensively (15,16,17,25) and up to our knowledge, the use of topical N.S extract in treating A.R has not been studied yet. Although few studies have been conducted to illustrate the possibility of therapeutic effect of this herb on other allergic diseases like asthma (9,2,10,11,26) and allergic disease of the skin like urticaria (27) .…”