Pegfilgrastim is a colony stimulating factor. It is a man-made form of a protein that
stimulates the growth of white blood cells called neutrophils in your body. White blood cells help
your body fight against infection.
Pegfilgrastim is used to treat neutropenia, a lack of certain white blood cells caused by
receiving cancer chemotherapy. It is used in people with cancers other than bone marrow cancer.
Pegfilgrastim may also be used for other purposes not listed in this medication guide.