The condition and the treatment
If you have pulmonary fibrosis the tissues inside your lungs become scarred, which gets worse over time. It is called 'idiopathic' because the cause of the disease is unknown. The scarring means that it is hard for the person to breathe, making everyday activities more difficult.
Nintedanib (Ofev) helps to stop the disease getting worse.
NHS Choices may be a good place to find out more.