Pirfenidone can inhibit the occurrence and development of pulmonary fibrosis, reduce pulmonary exudation by inhibiting VEGF and promote pulmonary recovery. In our study, subjects with checkpoint inhibitor-related pneumonitis receive pirfenidone plus methylprednisolone or methylprednisolone.
Checkpoint inhibitor-related pneumonitis (CIP）is a common fatal immune-related adverse event of PD-1/PD-L1 inhibitors. Some CIP patients have poor effect on hormone therapy, and the remission time of CIP varies greatly. Antifibrotic drugs may be effective in patients with CIP.