Lenalidomide is an immunomodulatory and targeted therapy medication primarily prescribed for the treatment of cancers such as multiple myeloma, myelodysplastic syndromes, certain types of lymphoma (including mantle cell lymphoma and follicular lymphoma), and, less commonly, for other blood disorders. It works by enhancing the immune response, preventing the growth of cancer-supporting blood vessels, and specifically inhibiting cancer cell growth and survival within the body. Lenalidomide is typically available as an oral capsule to be taken once daily under close supervision by medical professionals, and the precise usage depends on the type of condition being treated.