The present disclosure relates to RNAi agents useful in methods of treating Beta-ENaC-related diseases such as cystic fibrosis, pseudohypoaldosteronism type 1 (PHA1), Liddle's syndrome, hypertension, alkalosis, hypokalemia, and obesity-associated hypertension, using a therapeutically effective amount of a RNAi agent to Beta-ENaC.本發明係關於RNAi劑,使用治療有效量之針對β-ENaC之RNAi劑可用於治療β-ENaC相關疾病之方法,該等疾病諸如囊腫性纖維化、1型假醛固酮過少症(PHA1)、李德爾症候群(Liddle's syndrome)、高血壓、鹼中毒、低鉀血症及肥胖相關之高血壓。