Meget sjældne tilfælde af en alvorlig form for allergisk reaktion er set, specielt lige efter en injektion.
Almost all patients have to be treated with iron supplements during their NeoRecormon therapy. • Rarely, allergies or skin reactions, such as rash or hives, itching or reactions around the injection site have occurred. • Very rarely a severe form of allergic reaction has occurred, especially just after an injection.