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(filgrastim) Injection


NEUPOGEN (filgrastim) is a 175 amino acid human granulocyte colony-stimulating factor (G-CSF) manufactured by recombinant DNA technology. NEUPOGEN is produced by Escherichia coli (E coli) bacteria into which has been inserted the human granulocyte colony-stimulating factor gene. NEUPOGEN has a molecular weight of 18‚800 daltons. The protein has an amino acid sequence that is identical to the natural sequence predicted from human DNA sequence analysis‚ except for the addition of an N-terminal methionine necessary for expression in E coli. Because NEUPOGEN is produced in E coli‚ the product is non-glycosylated and thus differs from G-CSF isolated from a human cell.

NEUPOGEN injection is a sterile‚ clear‚ colorless‚ preservative-free liquid containing filgrastim at a specific activity of 1.0 ± 0.6 x 108 U/mg (as measured by a cell mitogenesis assay). The product is available in single-use vials and prefilled syringes. The single-use vials contain either 300 mcg/mL or 480 mcg/1.6 mL of filgrastim. The single-use prefilled syringes contain either 300 mcg/0.5 mL or 480 mcg/0.8 mL of filgrastim. See table below for product composition of each single-use vial or prefilled syringe.

  300 mcg/mL Vial 480 mcg/1.6 mL Vial 300 mcg/0.5 mL Syringe 480 mcg/0.8 mL Syringe
filgrastim 300 mcg 480 mcg 300 mcg 480 mcg
acetate 0.59 mg 0.94 mg 0.295 mg 0.472 mg
polysorbate 80 0.04 mg 0.064 mg 0.02 mg 0.032 mg
sodium 0.035 mg 0.056 mg 0.0175 mg 0.028 mg
sorbitol 50 mg 80 mg 25 mg 40 mg
water for Injection        
USP q.s. ad* 1 mL 1.6 mL 0.5 mL 0.8 mL
*quantity sufficient to make

What are the possible side effects of filgrastim (Neupogen, Neupogen SingleJect)?

Get emergency medical help if you have any of these signs of an allergic reaction: hives; difficulty breathing; swelling of your face, lips, tongue, or throat.

Stop using filgrastim and call your doctor at once if you have a serious side effect such as:

  • sudden or severe pain in your left upper stomach spreading up to your shoulder;
  • rapid breathing or feeling short of breath; or
  • signs of infection such as fever, chills, sore throat, flu symptoms, easy bruising or bleeding (nosebleeds, bleeding gums), loss of appetite, nausea and...

Read All Potential Side Effects and See Pictures of Neupogen »

What are the precautions when taking filgrastim injection (Neupogen)?

Before using filgrastim, tell your doctor or pharmacist if you are allergic to it; or to tbo-filgrastim, pegfilgrastim, or filgrastim-sndz; or if you have any other allergies. This product may contain inactive ingredients (such as dry natural rubber/latex in the needle cover on the prefilled syringe), which can cause allergic reactions or other problems. Talk to your pharmacist for more details.

Before using this medication, tell your doctor or pharmacist your medical history, especially of: sickle cell disease, heart disease, spleen problems, other blood disorders (e.g., myelodysplastic syndrome, congenital neutropenia), certain skin disorders (e.g., psoriasis).

If you are scheduled to have radiation therapy, tell your doctor you are taking filgrastim. This medication...

Read All Potential Precautions of Neupogen »

Last reviewed on RxList: 8/14/2015
This monograph has been modified to include the generic and brand name in many instances.

Neupogen - User Reviews

Neupogen User Reviews

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