GLP-1 receptor agonist use is associated with a significantly decreased risk of multiple myeloma (HR 0.64, p = 0.01), but not chronic myeloid leukemia (HR 1.06, p = 0.857), acute myeloid leukemia (HR 0.81, p = 0.354), or myelodysplastic syndrome (HR 0.98, p = 0.996). Here, GLP1R is linked to plasma cell myeloma.