Endometriosis related pain, Overactive Bladder, Diabetic neuropathic pain, Refractory or unexplained chronic cough

Inclusion Criteria

- Participant must be 18 to 79 years of age inclusive, at the time of signing the informed consent.
- Participants with a medical history of chronic (For Hepatically Impaired Participants only):
-- documented liver cirrhosis confirmed by histopathology, laparoscopy, fibroscan, CT, MRI or ultrasound, AND
-- hepatic impairment (Child-Pugh A or B or C), AND
-- stable liver disease, i.e. same Child-Pugh class for at least 2 months prior to screening.
- Body mass index (BMI) within the range 18 to 38 kg/m^2 (both inclusive).
- Male or female.
- Women of childbearing potential (WOCBP) must agree to use contraception for the duration of the study. This applies for the time period between signing of the Informed Consent Form until at least 30 days after the last dose of the study drug.
- Capable of giving signed informed consent as described in study protocol which includes compliance with the requirements and restrictions listed in the informed consent form (ICF) and in this protocol.

Exclusion Criteria

- Any relevant disease (other than those related to hepatic impairment for the hepatic impaired participants) within 4 weeks prior to study drug administration including infections and acute gastro-intestinal diseases (vomiting, diarrhea, constipation) requiring medical treatment.
- Renal failure with an estimated glomerular filtration rate (eGFR) ≤ 35 mL/min, according to Chronic Kidney Disease Epidemiology Collaboration (CKD-EPI) equation.
- Use of strong CYP3A4 and P-glycoprotein inhibitors from 2 weeks before study treatment until last day of blood sampling for pharmacokinetics after study drug administration.
- Use of CYP3A4 and P-glycoprotein inducers from 2 weeks before study treatment until last day of blood sampling for pharmacokinetics after study drug administration.
- Use of drugs which may affect absorption (e.g. loperamide, metoclopramide), and systemic administration of any broad-spectrum antibiotic within 1 week before first study drug administration, unless the drug is part of the mandatory dosing regimen for treatment of hepatic impairment or related conditions.
- Indication or evidence for long QT syndrome; Participants in control arm only: QT interval corrected using Fridericia's method (QTcF) > 450 msec.
- Ascites qualitatively estimated as severe ascites by physical examination, with need of paracentesis; or a recent history of paracentesis.
- Alkaline phosphatase (AP) ≥4 times the upper limit of normal (ULN).
- Aspartate aminotransferase (AST) or alanine aminotransferase (ALT) in conjunction with gamma-glutamyl transpeptidase (GGT) ≥4 times the ULN (an isolated elevation of GGT above 4 times ULN will not exclude the participant).
- International Normalized Ratio (INR) > 2.7.
- Inability to provide informed consent: Participants with psychiatric disorders, including hepatic encephalopathy >grade 2, e.g. number connection test >80 seconds.