鹽酸芬司必利抑制劑Fenspiride, an oxazolidinone spiro compound, is a drug used in the therapy of certain respiratory diseases. It is approved for use in Russia for the therapy of chronic and acute inflammatory diseases of ENT organs and the respiratory tract (like sinusitis, tracheobronchitis, otitis, laryngitis, and rhinopharyngitis), and for maintenance therapy of asthma.