Nalbuphine ER

Study of Nalbuphine ER in Participants With Hepatic Impairment

A Randomized, Double-Blind, Placebo-Controlled, Parallel, 4-Arm Dose Ranging Study of the Safety and Efficacy of Nalbuphine Extended-Release Tablets (NAL ER) for the Treatment of Cough in Idiopathic Pulmonary Fibrosis (IPF)