Idiopathic Pulmonary Fibrosis (IPF)-Related Chronic Cough Reduction With Nalbuphine (NAL) Extended-Release (ER) Tablets

Inclusion Criteria:

* Diagnosis of IPF as determined by the Investigator based on American Thoracic Society (ATS)/European Respiratory Society (ERS)/Japanese Respiratory Society (JRS)/Latin American Thoracic Society (ALAT) clinical practice guidelines.
* Chronic cough for ≥8 weeks prior to Screening.
* PGI-Severity Score ≥ 2 at Screening.
* Forced vital capacity (FVC) ≥40 percent (%) of predicted at Screening.
* Diffusing capacity for carbon monoxide (DLCO) ≥25% of predicted during Screening or within 12 weeks prior to Screening.
* If currently taking antifibrotic medication (nintedanib, pirfenidone, nerandomilast) should be on a stable dose for at least 6 weeks prior to the Baseline Visit.

Exclusion Criteria:

* Clinical diagnosis or clinical suspicion of an upper or lower respiratory tract infection in the last 8 weeks prior to the Screening visit or during Screening.
* Hospitalization for any respiratory illness (including acute exacerbation of IPF) within 8 weeks prior to Screening.

Note: Other protocol-defined inclusion/exclusion criteria may apply.