Amgen Inc's Kyprolis helped patients with relapsed multiple myeloma live twice as long before their blood cancer worsened compared to a regimen containing rival drug Velcade, according to an interim analysis announced by the company on Sunday. REUTERS: Amgen Inc's Kyprolis helped patients with relapsed multiple myeloma live twice as long before their blood cancer worsened compared to a regimen containing rival drug Velcade, according to an interim analysis announced by the company on Sunday.