My son has taken filgastrim injections many times and it does not raise his white cells. They keep insisting on giving it to him. It destroys his white cells and ancs. Almost bursted his spleen with 4 injections back to back. Gcsf shots. Be careful. Make sure they work.. long and short term injections. I dont get why they keep insisting it will help my son with his white cells. It lowers them to where he had zero anc.... and of coirse he fot influenza A.. Nplates started the downfall..