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Systematic (IUPAC) name
Human granulocyte colony stimulating factor
CAS number 143011-72-7
ATC code L03AA02
PubChem  ?
DrugBank BTD00072
Chemical data
Formula C845H1343N223O243S9 
Mol. mass 18802.8 g/mol
Pharmacokinetic data
Bioavailability  ?
Metabolism  ?
Half life  ?
Excretion  ?
Therapeutic considerations
Pregnancy cat.


Legal status
Routes  ?

Filgrastim is a granulocyte colony-stimulating factor (G-CSF) analog used to stimulate the proliferation and differentiation of granulocytes.[1] It is produced by recombinant DNA technology. The gene for human granulocyte colony-stimulating factor is inserted into the genetic material of Escherichia coli. The G-CSF then produced by E. coli is only slightly different from G-CSF naturally made in humans.

It is marketed by Amgen with the brand name Neupogen.


Therapeutic uses

Filgrastim is used to treat neutropenia (a low number of neutrophils), stimulating the bone marrow to increase production of neutrophils. Causes of neutropenia include chemotherapy and bone marrow transplantation.

Filgrastim is also used to increase the number of hematopoietic stem cells in the blood before collection by leukapheresis for use in hematopoietic stem cell transplantation.


Filgrastim should not be used in patients with known hypersensitivity to E. coli-derived proteins.

Adverse effects

The most commonly observed adverse effect is mild-to-moderate bone pain after repeated administration and local skin reactions at the site of injection.


  1. ^ Beveridge RA, Miller JA, Kales AN, et al (1998). "A comparison of efficacy of sargramostim (yeast-derived RhuGM-CSF) and filgrastim (bacteria-derived RhuG-CSF) in the therapeutic setting of chemotherapy-induced myelosuppression". Cancer Invest. 16 (6): 366–73. PMID 9679526.
  • Budiono Santoso; Chris J. van Boxtel; Boxtel, Christoffel Jos van (2001). Drug benefits and risks: international textbook of clinical pharmacology. New York: Wiley. ISBN 0-471-89927-5. 
  • "Neupogen Prescribing Information." Accessed 10/20/05.
This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Filgrastim". A list of authors is available in Wikipedia.
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