Are you undergoing treatment for cancer? Or are you undergoing treatment for a condition related to the bone marrow? At such times, doctors are constantly monitoring the white blood cells in your body. Because, due to some treatments, these cells decrease, and the chances of developing bacterial infections increase. At such times, a special medicine called Filgrastim comes to your aid, which strengthens the body's immune system. Let's talk about this simply.
Simply put, what is this Filgrastim (G-CSF)?
Filgrastim is a protein that is naturally produced in our bodies, as well as a drug made in a laboratory. It is also called G-CSF. Its full name is Granulocyte Colony-Stimulating Factor. Although the name is a bit complicated, what it does is very simple.
Think of our bone marrow as a factory that makes blood cells. What the drug Filgrastim does is go to this factory and tell it, "Okay, now quickly make some more neutrophils , a type of white blood cell."
So, who are these neutrophils?
They are like soldiers in our bodies. When germs like bacteria enter the body, these cells called neutrophils are the first to fight them and protect us from diseases. These cells can be destroyed by things like chemotherapy. That's when the Filgrastim injection is given to increase the production of these cells.
In what cases is this medicine used?
This medicine is mainly used in several situations.
- For those undergoing cancer treatment (chemotherapy): Chemotherapy drugs that affect the bone marrow can reduce the number of white blood cells, reducing the risk of fever and infection.
- Before bone marrow transplant: When it is necessary to collect white blood cells from the patient's own body, to increase their production.
- For people with severe chronic neutropenia: This is a condition in which some people have a low number of neutrophils in their body for a long time. This medicine is also given to reduce the risk of infections in these people.
- When exposed to radiation: High doses of radiation can damage the bone marrow. In such cases, it is also used to protect life.
Things you need to tell your doctor before taking medicine
Before you start this vaccine, you should definitely inform your doctor about these things.
Hiding this information will only put your health at risk. So be clear about everything.
- If you have an allergy to Filgrastim, pegfilgrastim , or any other medicine, food, or dye.
- If you have an allergy to latex (some syringes may contain latex components).
- If you have kidney disease .
- If you have sickle cell disease . This is a hereditary condition that causes the red blood cells to change shape.
- If you are currently receiving radiation therapy .
- If you are pregnant, trying to get pregnant, or breastfeeding .
How is this vaccine used?
This medicine is given either as a subcutaneous injection or as an intravenous infusion. It is usually given in a hospital or clinic.
However, if you have to give yourself this vaccine at home, your doctor or nurse will explain to you exactly how to do it. Read the instructions that come with the medicine carefully and follow them exactly. It is very important to take the correct dose at the correct time.
Very important: Never throw used needles and syringes in the trash . They should be placed in a special sharps container that can be removed. If you don't have one, ask your doctor for one.
What if I miss a dose of medicine?
It is not a good idea to miss a dose of this medicine. If you do forget, do not panic and call your doctor immediately for advice.
What side effects can be expected?
Like any medication, this one can have side effects, some of which need to be addressed immediately.
| Side effect | Description and what to do |
|---|---|
| Side effects that should be reported to the doctor immediately | |
| Allergic reactions | Skin rash, itching, swelling of the face, lips, or tongue. If you notice these, seek medical advice immediately. |
| Difficulty breathing | Shortness of breath, rapid breathing. |
| Pain in the left side of the stomach or shoulder | This could be a sign of an enlarged spleen. Tell your doctor immediately. |
| Kidney-related symptoms | Decreased urine output, red or dark brown urine, swelling of the face or ankles. |
| Other serious symptoms | Severe dizziness, red spots on the body, unusual bruising or bleeding, fever. |
| Side effects that are usually not serious, but should be reported to the doctor if they persist | |
| Bone pain | This is a very common side effect. This pain occurs because the medicine stimulates the bone marrow. If the pain is severe, talk to your doctor. |
| Other common disorders | Headache, muscle pain, diarrhea, hair loss, cough. |
What if I take too much medicine? (Overdose)
If you think you have taken an overdose, don't panic. Go to the Emergency Department (ETU) of your nearest hospital immediately. Alternatively, call the National Poisons Information Centre at the Colombo National Hospital for advice.
How to store the medicine?
It is very important to store this correctly.
- Keep it out of the reach of children .
- Store in the fridge at a temperature between 2 and 8 degrees Celsius. Keep it on an inside shelf, not in the door.
- Never freeze the medicine. Doing so will destroy its effectiveness.
- Keep it in the box it came in, protected from light and heat.
- If it has been out of the refrigerator for more than 24 hours, discard it without using it.
- Do not use expired medicine.
Take-Home Message
- Filgrastim is an important vaccine that protects you from infections by increasing the number of white blood cells (neutrophils) that are reduced due to things like cancer treatment.
- Follow your doctor's instructions exactly. Do not change the dosage or timing.
- Watch out for serious side effects (difficulty breathing, severe pain, allergic reactions). If you experience any of these, tell your doctor immediately.
- Dispose of used needles and syringes safely in a sharps container.
- Always keep the medicine in the fridge, but never let it freeze.
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