CRP and obstructive sleep apnea syndrome: It was shown in the study by Lin JL et al.18 that Montelukast has a significant effect on patients with bronchial asthma complicated with OSAHS and can effectively reduce the levels of TNR-α, CRP, IL-6, AHI and FeNO, providing reference for clinical medication in elderly patients with bronchial asthma complicated with OSAHS.