Conclusion
This paper demonstrated the effect of topical pentasodium diethylenetriamine pentaacetate in lowering an elevated calcium cation in mucus of anosmia-related COVD-19 infection. After treatment with pentasodium diethylenetriamine pentaacetate compared with sodium chloride, significant improvement was observed from functional anosmia to hyposmia with a decrease of calcium cation concentration. Based on the results of this study, topical pentasodium diethylenetriamine pentaacetate may be a useful specific therapy for anosmia associated with COVD-19 infection.