The present disclosure provides compounds effective in increasing mucociliary clearance in a subject. In one embodiment, the compounds are of the general formula I. The present disclosure further shows that such compounds are effective in increasing activation of the CFTR, thereby increasing mucociliary clearance in the subject. The present disclosure further shows that such compounds are effective in increasing the depth of ASL, thereby increasing mucociliary clearance in the subject. In one embodiment of each of the foregoing, the subject is free from congenital or genetic defect in the cellular mucociliary clearance apparatus and/or acquired abnormality in the cellular mucociliary clearance apparatus.
