PTGS2 and asthma: According to the network pharmacology results, quercetin, xanthine, lysine, tyrosine, luteolin, valine, platelet-activating factor, kaempferol, and ß-sitosterol are the main active components, and IL-6, TNF, CXCL8, VEGFA, MAPK3, IL-10, PTGS2, IL-1β, IL-4, and TLR4 are the potential targets of Danlong Dingchuan Decoction in treating asthma.