100% rain or shine. shouldn't mean going back to the doctoro just for a shot. with neulasta onpro patients get their day back... to be with family, or just to sleep in. strong chemo can put you at risk of serious infection. in a key study neulasta reduced the risk of infection from 17% to 1%, a 94% decrease. neulasta onpro is designed to deliver neulasta the day after chemo and is used by most patients today. neulasta is for certain cancer patients receiving strong chemotherapy. do not take neulasta if you're allergic to it or neupogen (filgrastim). an incomplete dose could increase infection risk. 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.