strong chemo can put you at risk of serious infection. neulasta helps reduce infection risk by boosting your white blood cell count, which strengthens your immune system. in a key study, neulasta reduced the risk of infection from 17% to 1%, a 94% decrease. applied the day of chemo, neulasta onpro is designed to deliver neulasta the next day. neulasta is for certain cancer patients receiving strong chemotherapy. do not take neulasta if you're allergic to neulasta or neupogen (filgrastim). ruptured spleen, sometimes fatal as well as serious lung problems, allergic reactions, kidney injuries, and capillary leak syndrome have occurred. report abdominal or shoulder tip pain, trouble breathing or allergic reactions to your doctor right away. in patients with sickle cell disorders, serious, sometimes fatal crises can occur. the most common side effect is bone and muscle ache. so why go back there? if you'd rather be home, ask your doctor about neulasta onpro.