Lung Therapeutics Inc. has divulged conjugates comprising epithelial sodium channel (ENaC) blockers (particularly, amiloride and benzamil) covalently linked to peptides to retain in lung tissues reported to be useful for the treatment of cystic fibrosis, idiopathic pulmonary fibrosis, chronic obstructive pulmonary disease, asthma, primary ciliary dyskinesia, pulmonary emphysema, pneumonia and bronchiectasis.