Smoking is associated with constant cough which is resistant to
oseltamivir therapy for suspected COVID-19
22 COVID-19-suspected patients without hypoxia were divided into 11
current smokers and 11 never smokers. Four current smokers experienced
constant cough after oseltamivir administration, compared with 0% of
never smokers. The cough disappeared in3 cases after ciclesonide
inhalation. Ciclesonide may improve the constant cough in current
smokers with COVID-19.