Filgrastim-sndz

Generic name: Filgrastim-sndz
Brand name: Zarxio
Drug class: Colony stimulating factors

Medically reviewed by  A Ras MD.

What is filgrastim-sndz used for?

Filgrastim-sndz is used to lower the chance of getting an infection in people with bone marrow problems caused by chemo. It is used to raise the number of white blood cells in certain patients. Filgrastim-sndz may be given to you for other reasons.

Description

Filgrastim-sndz is a 175 amino acid human granulocyte colony-stimulating factor (G-CSF) manufactured by recombinant DNA technology.

ZARXIO is produced by Escherichia coli (E coli) bacteria into which has been inserted the human granulocyte colony-stimulating factor gene. ZARXIO 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 ZARXIO is produced in E coli‚ the product is non-glycosylated and thus differs from G-CSF isolated from a human cell.

ZARXIO injection is a sterile‚ clear‚ colorless to slightly yellowish‚ preservative-free liquid containing filgrastim-sndz at a specific activity of 1.0 x 108 U/mg (as measured by a cell mitogenesis assay). The product is available in single-dose prefilled syringes. The single-dose prefilled syringes contain either 300 mcg/0.5 mL or 480 mcg/0.8 mL of filgrastim-sndz. See Table 4 below for product composition of each single-dose prefilled syringe.

Table 4. Product Composition
300 mcg/0.5 mL
Syringe
480 mcg/0.8 mL
Syringe

Filgrastim-sndz

300 mcg

480 mcg

Glutamic Acid

0.736 mg

1.178 mg

Polysorbate 80

0.02 mg

0.032 mg

Sorbitol

25 mg

40 mg

Sodium hydroxide

q.s.

q.s.

Water for Injection USP q.s. ad*

ad 0.5 mL

ad 0.8 mL

*quantity sufficient to make.

 Mechanism of Action

Colony-stimulating factors are glycoproteins which act on hematopoietic cells by binding to specific cell surface receptors and stimulating proliferation‚ differentiation commitment‚ and some end-cell functional activation.

Endogenous G-CSF is a lineage-specific colony-stimulating factor that is produced by monocytes‚ fibroblasts, and endothelial cells. G-CSF regulates the production of neutrophils within the bone marrow and affects neutrophil progenitor proliferation‚ differentiation, and selected end-cell functions (including enhanced phagocytic ability‚ priming of the cellular metabolism associated with respiratory burst‚ antibody-dependent killing, and the increased expression of some cell surface antigens). G-CSF is not species-specific and has been shown to have minimal direct in vivo or in vitro effects on the production or activity of hematopoietic cell types other than the neutrophil lineage.

Before taking filgrastim-sndz, tell your doctor:

  • If you are allergic to filgrastim-sndz; any part of this medicine; or any other drugs, foods, or substances. Tell your doctor about the allergy and what signs you had.

This medicine may interact with other drugs or health problems.

Tell your doctor and pharmacist about all of your drugs (prescription or OTC, natural products, vitamins) and health problems. You must check to make sure that it is safe for you to take filgrastim-sndz with all of your drugs and health problems. Do not start, stop, or change the dose of any drug without checking with your doctor.

What are some things I need to know or do while I take filgrastim-sndz?

  • Tell all of your health care providers that you take filgrastim-sndz. This includes your doctors, nurses, pharmacists, and dentists.
  • If you have a latex allergy, talk with your doctor. Some products have latex.
  • Do not get filgrastim-sndz at the same time or within 24 hours before or after chemo or radiation treatment. Talk with your doctor.
  • Have blood work checked as you have been told by the doctor. Talk with the doctor.
  • This medicine may affect certain lab tests. Tell all of your health care providers and lab workers that you take filgrastim-sndz.
  • This medicine may cause a severe and sometimes deadly problem called capillary leak syndrome (CLS). CLS may lead to low blood pressure, abnormal heartbeat, chest pain, or heart attack. It may also lead to lung or breathing problems, bleeding or lower blood flow in the stomach or bowel, kidney problems, swelling, or feeling confused. If you have questions, talk with the doctor.
  • Some people with sickle cell disease have had times where the sickle cell disease has gotten worse when taking filgrastim-sndz. Sometimes, this has been deadly. Talk with the doctor.
  • Tell your doctor if you are pregnant, plan on getting pregnant, or are breast-feeding. You will need to talk about the benefits and risks to you and the baby.

How is filgrastim-sndz best taken?

Use filgrastim-sndz as ordered by your doctor. Read all information given to you. Follow all instructions closely.

  • It is given as a shot into the fatty part of the skin.
  • It may be given into a vein by a doctor or other healthcare provider.
  • Keep taking filgrastim-sndz as you have been told by your doctor or other health care provider, even if you feel well.
  • If you will be giving yourself the shot, your doctor or nurse will teach you how to give the shot.
  • Before using filgrastim-sndz, take it out of the refrigerator and leave it at room temperature for 30 minutes.
  • Do not use if the solution is cloudy, leaking, or has particles.
  • Do not use if solution changes color.
  • Do not shake the solution.
  • Wash your hands before and after you give the shot.
  • Do not give into skin that is irritated, tender, bruised, red, scaly, hard, scarred, or has stretch marks.
  • Move the site where you give the shot with each shot.
  • Throw away any part left over after the dose is given.
  • Throw syringe away after use. Do not use the same syringe more than one time.
  • Throw away needles in a needle/sharp disposal box. Do not reuse needles or other items. When the box is full, follow all local rules for getting rid of it. Talk with a doctor or pharmacist if you have any questions.
  • If you get filgrastim-sndz on the skin, wash it off right away with soap and water.
  • If you get filgrastim-sndz in the eyes, flush right away with cool water and get medical help.

What do I do if I miss a dose?

  • Call your doctor to find out what to do.

What are the side effects of filgrastim-sndz that I need to call my doctor about immediately?

WARNING/CAUTION: Even though it may be rare, some people may have very bad and sometimes deadly side effects when taking a drug. Tell your doctor or get medical help right away if you have any of the following signs or symptoms that may be related to a very bad side effect:

  • Signs of an allergic reaction, like rash; hives; itching; red, swollen, blistered, or peeling skin with or without fever; wheezing; tightness in the chest or throat; trouble breathing, swallowing, or talking; unusual hoarseness; or swelling of the mouth, face, lips, tongue, or throat.
  • Signs of kidney problems like unable to pass urine, change in how much urine is passed, blood in the urine, or a big weight gain.
  • Signs of lung or breathing problems like shortness of breath or other trouble breathing, cough, or fever.
  • Dark urine.
  • Chest pain or pressure or a fast heartbeat.
  • Dizziness or passing out.
  • Sweating a lot.
  • Fast breathing.
  • Coughing up blood.
  • Any unexplained bruising or bleeding.
  • Purple spots or redness of the skin.
  • Swelling.
  • Numbness or tingling.
  • Enlarged and ruptured spleens have happened with filgrastim-sndz. Sometimes, ruptured spleens have been deadly. Call your doctor right away if you have left upper stomach pain or left shoulder pain.
  • Swelling of the main blood vessel that comes out of the heart (aorta) has happened with filgrastim-sndz. Call your doctor right away if you feel very tired or weak. Call your doctor if you have fever, stomach pain, or back pain.

What are some other side effects of filgrastim-sndz?

All drugs may cause side effects. However, many people have no side effects or only have minor side effects. Call your doctor or get medical help if any of these side effects or any other side effects bother you or do not go away:

  • Bone, joint, or muscle pain.
  • Headache.
  • Upset stomach or throwing up.
  • Feeling tired or weak.
  • Diarrhea.
  • Hair loss.

These are not all of the side effects that may occur. If you have questions about side effects, call your doctor. Call your doctor for medical advice about side effects.

You may report side effects to the FDA at 1-800-332-1088. You may also report side effects at https://www.fda.gov/medwatch.

If overdose is suspected:

If you think there has been an overdose, call your poison control center or get medical care right away. Be ready to tell or show what was taken, how much, and when it happened.

How do I store and/or throw out filgrastim-sndz?

  • Store in a refrigerator. Do not freeze.
  • Store in the original container to protect from light.
  • If filgrastim-sndz freezes, let it thaw in the refrigerator before use.
  • Do not use if filgrastim-sndz has been frozen more than once.
  • If needed, filgrastim-sndz can be left out at room temperature for some time. Be sure you know how long you can leave filgrastim-sndz at room temperature before you need to throw it away.
  • Do not put filgrastim-sndz back in the refrigerator after it has been stored at room temperature.
  • Keep all drugs in a safe place. Keep all drugs out of the reach of children and pets.
  • Throw away unused or expired drugs. Do not flush down a toilet or pour down a drain unless you are told to do so. Check with your pharmacist if you have questions about the best way to throw out drugs. There may be drug take-back programs in your area.

SRC: NLM .