Aranesp contains darbepoetin alfa, a synthetic form of erythropoietin, which stimulates the bone marrow to produce red blood cells. It's indicated for treating anemia due to CKD in patients on dialysis and not on dialysis, and anemia due to concomitant myelosuppressive chemotherapy in patients with non-myeloid malignancies. The 40 mcg prefilled syringe delivers 40 mcg of darbepoetin alfa in 0.4 mL of solution. . Please Note that product description, color, ingredients, package and other information maybe different from the original pack kindly check the product for more accurate details.