Virkningen af Aranesp er undersøgt hos patienter med langvarig nyresygdom (hvor Aranesp blev sammenlignet med rekombinant humant erythropoietin i fire undersøgelser med flere end 1 200 patienter) og hos patienter i kemoterapi for kræftformer som lungekræft, myelom eller lymfom, hvor Aranesp blev sammenlignet med placebo (virkningsløs behandling) i to undersøgelser med 669 patienter.
The effectiveness of Aranesp has been studied in patients with long-term kidney disease, where it was compared with recombinant human erythropoietin in four studies involving over 1,200 patients, and in patients receiving chemotherapy for cancer such as lung cancer, myeloma or lymphoma, where it was compared with placebo (a dummy treatment) in two studies involving 669 patients.