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Zedoary turmeric oil (ZTO) has been widely used in clinic. However, the unpleasant induced dyspnoea inevitably impedes its clinical application. Thus, it is urgent to elucidate the mechanism underlying the ZTO‐induced dyspnoea. In this study, network pharmacology was firstly performed to search the clue of ZTO‐induced dyspnoea. The key target genes of ZTO‐induced dyspnoea were analysed using GO enrichment analysis and KEGG pathway analysis. GO analysis suggested that haem binding could be a key molecular function involved in ZTO‐induced dyspnoea. Hence, the haemoglobin (Hb) was focused for its oxygen‐carrying capacity with haem as its critical component binding to the oxygen. Ultraviolet–visible absorption spectrum indicated that the ZTO injection (ZTOI) perturbed the Soret band of Hb, suggesting an interaction between ZTO and Hb. GC–MS analysis revealed that β‐elemene, germacrone, curdione and furanodiene were main components of ZTOI. Molecular docking was used to illustrate the high affinity between representative sesquiterpenes and Hb, which was finally confirmed by surface plasmon resonance, suggesting their potential roles in dyspnoea by ZTO. Following a network pharmacology‐driven strategy, our study revealed an intervened Hb‐based mechanism underlying the ZTO‐induced dyspnoea, providing a reference for elucidating mechanism underlying adverse drug reactions of herbal medicines in clinic.

Network pharmacology‐based dissection of the underlying mechanisms of dyspnoea induced by zedoary turmeric oil