A Study to Find Out How Nintedanib is Taken up in the Body and How Well it is Tolerated in Children and Adolescents With Interstitial Lung Disease (ILD)

Inclusion Criteria

• Children and adolescents 6 to 17 years old at Visit 2.
• Signed and dated written informed consent and assent, where applicable, in accordance with International Conference on Harmonisation-Good Clinical Practice (ICH-GCP) and local legislation prior to admission to the trial.
• Male or female patients. Female of childbearing potential (WOCBP) must confirm that sexual abstinence is standard practice and will be continued until 3 months after last drug intake, or be ready and able to use a highly effective method of birth control per International Conference on Harmonisation (ICH) M3 (R2) that results in a low failure rate of less than 1% per year when used consistently and correctly, in combination with one barrier method, from 28 days prior to initiation of study treatment, during treatment and until 3 months after last drug intake. Sexual abstinence is defined as abstinence from any sexual act that may result in pregnancy. A list of contraception methods meeting these criteria is provided in the parental information.
• Patients with evidence of fibrosing Interstitial Lung Disease (ILD) on High-Resolution Computed Tomography (HRCT) within 12 months of Visit 1 as assessed by the investigator and confirmed by central review.
• Patients with Forced Vital Capacity (FVC)% predicted ≥25% at Visit 2. [Note: Predicted normal values will be calculated according to GLI (Global Lung Initiative)]
• Patients with clinically significant disease at Visit 2, as assessed by the investigator based on any of the following:
• Fan score ≥3, or
• Documented evidence of clinical progression over time based on either
• a 5-10% relative decline in FVC% predicted accompanied by worsening symptoms, or
• a ≥10% relative decline in FVC % predicted, or
• increased fibrosis on HRCT, or
• other measures of clinical worsening attributed to progressive lung disease (e.g. increased oxygen requirement, decreased diffusion capacity).

Exclusion Criteria

• Aspartate Aminotransferase (AST) and/or Alanine Aminotransferase (ALT)>1.5 x Upper Level of Normal (ULN) at Visit 1.
• Bilirubin >1.5 x ULN at Visit 1.
• Creatinine clearance 2
• Prolongation of prothrombin time (PT) by >1.5 x ULN
• Prolongation of activated partial thromboplastin time (aPTT) by >1.5 x ULN
• History of thrombotic event (including stroke and transient ischemic attack) within 12 months of Visit 1.
• Known hypersensitivity to the trial medication or its components (i.e. soya lecithin).
• Patients with documented allergy to peanut or soya.
• Other disease that may interfere with testing procedures or in the judgment of the investigator may interfere with trial participation or may put the patient at risk when participating in this trial.
• Life expectancy for any concomitant disease other than Interstitial Lung Disease (ILD)<2.5 years (investigator assessment).
• Female patients who are pregnant, nursing, or who plan to become pregnant while in the trial.
• Patients not able or willing to adhere to trial procedures, including intake of study medication.
• Patients with any diagnosed growth disorder such as growth hormone deficiency or any genetic disorder that is associated with short stature (e.g. Turner Syndrome, Noonan Syndrome, Russell-Silver Syndrome) and/or treatment with growth hormone therapy within 6 months before Visit 2. Patients with short stature considered by the investigator to be due to glucocorticoid therapy may be included.
• Patients <13.5 kg of weight at Visit 1 (same threshold to be used for male and female patients).