Profile and management of toxicity of selinexor and belantamab mafodotin for the treatment of relapsed/refractory multiple myeloma: A systematic review.

Abstract

e20014 Background: Selinexor (Sel) and belantamab mafodotin (belamaf) were recently approved by the US FDA for treatment of relapsed/refractory multiple myeloma on July 2019 and August 2020 respectively. The toxicity profile of these drugs is a concern since these are approved for use in patients who have already undergone multiple lines of treatment. Methods: Six studies for Sel and two for belamaf were included after a systematic search of PubMed, Embase, Cochrane, and Clinicaltrials.gov. Results: The most common hematological toxicity associated with these two drugs is thrombocytopenia. The common G-3/4 hematological AEs of Sel were thrombocytopenia (39%-71%), anemia (16%-33%), leukopenia (8%-33%) and neutropenia (9%-33%) whereas common G-3/4 non-hematological AEs were hyponatremia (5%-26%), fatigue (13%-15%), diarrhea (5%-10%), eye disorders (9%-10%), musculoskeletal disorders (4%-10%), elevated liver enzymes (10%), peripheral neuropathy (5%) and vomiting (2-4%). Keratopathy and anemia were the major toxicities of belamaf. Most of these toxicities are manageable. Treatment modifications and dose interruption are usually needed when AEs are more than grade II. REMS program guidelines is recommended for close monitoring and evaluation of Sel and belamaf toxicities and early ophthalmological intervention. Conclusions: As these are newer drugs with limited data, continuous surveillance and monitoring is warranted during the treatment course with early mitigation strategies. The physician should be aware of thrombocytopenia and its management as well as belamaf ocular toxicity which is manageable but if missed could have serious complications.[Table: see text]