Immunex Corporation develops, manufactures, and markets therapeutic products for the treatment of cancer, infectious diseases, and autoimmune disorders. It offers products, such as Enbrel that is used in the treatment of rheumatoid arthritis; Novantrone, which is used to treat acute nonlymphocytic leukemia and pain associated with prostate cancer; and Leukine for use in bone marrow transplant patients. The company has franchise operations. It has a strategic alliance with American Home Products.
The company was founded in 1981 and is based in Seattle, Washington. As of July 15, 2002, Immunex Corporation was acquired by Amgen, Inc.