| E.1 Medical condition or disease under investigation | 
| E.1.1 | Medical condition(s) being investigated  | 
| Patients with Idiopathic Pulmonary Fibrosis | 
 
 
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| E.1.1.1 | Medical condition in easily understood language  | 
| Progressive, fatal lung disease with an unknown cause | 
 
 
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| E.1.1.2 | Therapeutic area  | Diseases [C] - Respiratory Tract Diseases [C08] | 
| MedDRA Classification | 
| E.1.2 Medical condition or disease under investigation | 
| E.1.2 | Version  | 13.1 | 
 
| E.1.2 | Level  | PT | 
 
| E.1.2 | Classification code  | 10021240 | 
 
| E.1.2 | Term  | Idiopathic pulmonary fibrosis | 
 
| E.1.2 | System Organ Class  | 10038738 - Respiratory, thoracic and mediastinal disorders | 
 
 
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| E.1.3 | Condition being studied is a rare disease  |  Yes  | 
| E.2 Objective of the trial | 
| E.2.1 | Main objective of the trial  | 
| To assess the long-term safety and tolerability of macitentan in patients with Idiopathic Pulmonary Fibrosis | 
 
 
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| E.2.2 | Secondary objectives of the trial  | 
 | 
| E.2.3 | Trial contains a sub-study  |  No  | 
| E.3 | Principal inclusion criteria  | 
- Signed informed consent prior to initiation of any study-related procedure.
 - Patients with IPF and having completed the double-blind AC-055B201/MUSIC study as scheduled, i.e., having remained in the study until the sponsor-declared end-of study, whether or not study treatment was prematurely discontinued.
 - Women of childbearing potential must have a negative pre-treatment serum pregnancy test and must use a reliable method of contraception during study treatment and for at least 28 days after study treatment termination. | 
 
 
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| E.4 | Principal exclusion criteria | 
- Any major violation of protocol AC-055B201/MUSIC.
 - Premature discontinuation of study treatment during the AC-055B201/MUSIC study due to an adverse event (AE) assessed as related to the use of macitentan, excluding events of IPF worsening.
 - Pregnancy or breast-feeding.
 - AST and/or ALT > 3 times the upper limit of the normal range.
 - Any known factor or disease that might interfere with treatment compliance, study conduct or interpretation of the results, such as drug or alcohol dependence or psychiatric disease.
 - Known hypersensitivity to drugs of the same class as macitentan, or any of the excipients. | 
 
 
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| E.5 End points | 
| E.5.1 | Primary end point(s) | 
- AEs leading to premature discontinuation of study drug.
 - Treatment-emergent SAEs up to 28 days after study drug discontinuation.
 - Occurrence of liver aminotransferase (ALT and/or AST) abnormality (> 3 and < or = 5 X ULN; > 5 and < or = 8 X ULN; > 8 X ULN) up to 28 days after study drug discontinuation. | 
 
 
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| E.5.1.1 | Timepoint(s) of evaluation of this end point | 
- 6-monthly safety visit 
 - Liver aminotransferase and pregnancy (if applicable): monthly 
 - Follow-up period 28 days after treatment discontinuation | 
 
 
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| E.5.2 | Secondary end point(s) | 
 | 
| E.5.2.1 | Timepoint(s) of evaluation of this end point | 
 | 
| E.6 and E.7 Scope of the trial | 
| E.6 | Scope of the trial | 
| E.6.1 | Diagnosis |  No  | 
| E.6.2 | Prophylaxis |  No  | 
| E.6.3 | Therapy |  Yes  | 
| E.6.4 | Safety |  Yes  | 
| E.6.5 | Efficacy |  No  | 
| E.6.6 | Pharmacokinetic |  No  | 
| E.6.7 | Pharmacodynamic |  No  | 
| E.6.8 | Bioequivalence |  No  | 
| E.6.9 | Dose response |  No  | 
| E.6.10 | Pharmacogenetic |  No  | 
| E.6.11 | Pharmacogenomic |  No  | 
| E.6.12 | Pharmacoeconomic |  No  | 
| E.6.13 | Others |  Yes  | 
| E.6.13.1 | Other scope of the trial description | 
 | 
| E.7 | Trial type and phase | 
| E.7.1 | Human pharmacology (Phase I) |  No  | 
| E.7.1.1 | First administration to humans |  No  | 
| E.7.1.2 | Bioequivalence study |  No  | 
| E.7.1.3 | Other |  No  | 
| E.7.1.3.1 | Other trial type description |  | 
| E.7.2 | Therapeutic exploratory (Phase II) |  Yes  | 
| E.7.3 | Therapeutic confirmatory (Phase III) |  No  | 
| E.7.4 | Therapeutic use (Phase IV) |  No  | 
| E.8 Design of the trial | 
| E.8.1 | Controlled |  No  | 
| E.8.1.1 | Randomised |  Information not present in EudraCT  | 
| E.8.1.2 | Open |  Information not present in EudraCT  | 
| E.8.1.3 | Single blind |  Information not present in EudraCT  | 
| E.8.1.4 | Double blind  |  Information not present in EudraCT  | 
| E.8.1.5 | Parallel group |  Information not present in EudraCT  | 
| E.8.1.6 | Cross over  |  Information not present in EudraCT  | 
| E.8.1.7 | Other |  Information not present in EudraCT  | 
| E.8.2 |  Comparator of controlled trial | 
| E.8.2.1 | Other medicinal product(s) |  Information not present in EudraCT  | 
| E.8.2.2 | Placebo  |  Information not present in EudraCT  | 
| E.8.2.3 | Other |  Information not present in EudraCT  | 
| E.8.3 | 
                                The trial involves single site in the Member State concerned
                             |  Yes  | 
| E.8.4 |  The trial involves multiple sites in the Member State concerned  |  No  | 
| E.8.5 | The trial involves multiple Member States |  Yes  | 
| E.8.5.1 | Number of sites anticipated in the EEA | 17 | 
| E.8.6 Trial involving sites outside the EEA | 
| E.8.6.1 | Trial being conducted both within and outside the EEA |  Yes  | 
| E.8.6.2 | Trial being conducted completely outside of the EEA |  No  | 
| E.8.6.3 | If E.8.6.1 or E.8.6.2 are Yes, specify the regions in which trial sites are planned | 
| Australia | 
 
| Canada | 
 
| Israel | 
 
| South Africa | 
 
| Turkey | 
 
| United States | 
 
 
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| E.8.7 | Trial has a data monitoring committee |  No  | 
| E.8.8 | 
                        Definition of the end of the trial and justification where it is not the last
                        visit of the last subject undergoing the trial
                     | 
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| E.8.9 Initial estimate of the duration of the trial | 
| E.8.9.1 | In the Member State concerned years | 5 | 
| E.8.9.1 | In the Member State concerned months | 0 | 
| E.8.9.1 | In the Member State concerned days | 0 | 
| E.8.9.2 | In all countries concerned by the trial years | 5 | 
| E.8.9.2 | In all countries concerned by the trial months | 0 | 
| E.8.9.2 | In all countries concerned by the trial days | 0 |