The experiment in vitro showed that BND at the concentration of 20mg/mL obviously inhibited the cytopathy of seven kinds of respiratory tract virus strains cultured in five kinds of culture cells.

• 为探讨其抗病毒作用，从体内外抗病毒实验对病毒宁滴剂抗呼吸道病毒作用进行了研究。