“… 1 It is approved by the US Food and Drug Administration for the treatment of metastatic melanoma, refractory non-small cell lung cancer (NSCLC), angiogenesis inhibitor-resistant renal cell carcinoma, and stem cell transplant-resistant classical Hodgkin lymphoma. 2 These medications act via blockade of the PD-1 receptor, which limits immune responses against tumors. Side effects can affect the gastrointestinal tract, liver, endocrine system, and skin.…”