Results The histamine-induced trachea constriction in guinea pigs was completely inhibited by SPFF,meanwhile,the constriction induced by acetylcholine was only partly cancelled by SPFF.

• 结果SPFF可完全抑制组胺所引起的气管收缩作用,但不能完全抑制乙酰胆碱所引起的气管收缩。