Retifanlimab Disease Interactions

Fatal and other serious complications can occur in patients who receive allogeneic hematopoietic stem cell transplantation (HSCT) before or after being treated with a programmed death receptor-1/ligand-1 (PD-1/PD-L1) blocking antibody. Transplant-related complications include hyperacute graft-versus-host disease (GVHD), acute GVHD, chronic GVHD, hepatic veno-occlusive disease after reduced intensity conditioning, and steroid-requiring febrile syndrome (without an identified infectious cause). These complications may occur despite intervening therapy between PD-1/PD-L1 blockade and allogeneic HSCT. It is recommended to follow patients closely for evidence of transplant-related complications and intervene promptly. The benefit versus risks of treatment with a PD-1/PD-L1 blocking antibody before or after an allogeneic HSCT should be considered.

Myasthenic syndrome/myasthenia gravis (including exacerbation) has been reported with the use of programmed death receptor-1/ligand-1 (PD-1/PD-L1) blocking antibodies. Care should be exercised when using PD-1/PD-L1 blocking antibodies in patients with myasthenia gravis.

Solid organ transplant rejection and other transplant (including corneal graft) rejection have been reported with the use of programmed death receptor-1/ligand-1 (PD-1/PD-L1) blocking antibodies. Care should be exercised when using PD-1/PD-L1 blocking antibodies in patients who have received a solid organ or other transplant.

No dose adjustment of retifanlimab is recommended for patients with mild hepatic impairment. No clinical studies were conducted with retifanlimab in patients with moderate to severe hepatic impairment. Retifanlimab can cause immune-mediated hepatitis. Monitor liver enzymes at baseline and periodically during treatment. Use caution in patients with hepatic impairment.