Growth Factor Injections — After Chemotherapy
These injections help your bone marrow make white blood cells again after chemotherapy. They also cause bone pain that is often severe and almost never properly warned about.
Medically reviewed by Dr. C. Raghavendra Reddy, Medical Oncologist, MBBS (Gold Medal) · DNB · DM (Medical Oncology, Gold Medal) · Last reviewed September 2026
- White cell recovery — Chemotherapy suppresses the bone marrow. Growth factor injections tell it to recover faster so you are protected against infection before your next cycle.
- Bone pain is expected — The injections cause real, sometimes severe bone pain. This is not a complication — it is a direct effect of the medicine doing its job.
- Not every patient needs them — Your oncologist decides based on your chemotherapy regimen and your personal risk factors, not as a routine add-on to every treatment.
- Two formulations exist — One is given as multiple injections over several days; the other is a single injection per cycle. Both cause bone pain.
on Panel
Survival Rate*
Treated
(800+ reviews)
Growth factor injections stimulate your bone marrow to produce white blood cells after chemotherapy depletes them. This lowers your risk of a serious infection between cycles. They are not given after every chemotherapy regimen — your oncologist decides based on the drugs used and your individual risk.
What is the difference between the two types of growth factor injection?
| Feature | Short-acting G-CSF (filgrastim) | Long-acting G-CSF (pegfilgrastim) |
|---|---|---|
| Generic name | Filgrastim | Pegfilgrastim |
| Indian brand examples | Grafeel, Neupogen, Grastofil | Peg-Grastofil, Fulphila, Neulasta |
| How often injected | Multiple injections across the days following each chemotherapy cycle | One injection per chemotherapy cycle |
| Bone pain | Yes — builds across the days you are injecting | Yes — often a single intense episode in the days after the injection |
| What it does | Stimulates the bone marrow to produce infection-fighting white blood cells | Same action; modified so the medicine remains active in the body for longer |
| Cost profile | Lower per injection; more injections are needed per cycle | Higher per injection; one injection covers the full cycle |
Why do growth factor injections cause such intense bone pain?
The pain comes from your bone marrow being forced to work far harder than it normally would. Your marrow sits inside the bones — in your sternum, pelvis, spine and long bones. When the injection signals it to produce white cells rapidly, it expands and creates pressure inside that confined space. That pressure is what you feel as deep, aching pain.
If no one warned you about this, you are not alone. This is one of the most consistently underprepared side effects in chemotherapy care.
The pain means the medicine is working, not that something has gone wrong. It does not mean the cancer is spreading. It tends to follow a predictable pattern across your injection schedule, so once you know when it arrives, you can plan for it.
Where to find us
Our centres in and around Hyderabad
Addressed by landmark, because that is how this city navigates. Each centre also names the areas it serves, so you can place it without a map. Consultation and day-care Chemotherapy run at every one of them.
17+ senior cancer specialists. One panel for your case.
Trained at AIIMS, Tata Memorial, and leading international centres. Combined 150+ years of experience. Every complex case is reviewed by 3+ of them — together.
Dr. C. Raghavendra Reddy
MBBS(Gold Medal), DNB(General Medicine), DM(Medical Oncology)(Gold Medal)
Dr. Bharati Devi Gorantla
MBBS, MD(General Medicine), DM(Medical Oncology)(Adyar,Chennai), ECMO, MRCP SCE(UK)
Dr. Owais Mohammed
MBBS, MD (General Medicine), DrNB (Medical Oncology), ECMO, MRCP SCE (Medical Oncology) (UK)
Dr. Muralidhar Muddusetty
MBBS (AIIMS), MS (Surgery) (AIIMS), DNB (Surgical Oncology), MRCS (Edinburgh)
Dr. Vinay Mamidala
MBBS, MS(General Surgery), M.Ch(Surgical Oncology), FMAS, FARIS(Ongoing)
Dr. Vajja Sandeep Kumar
MBBS, MS (General Surgery), DrNB (Surgical Oncology), FALS Oncology
Want a specific doctor for your case? Mention them when booking.
Book Free ConsultationBook an appointment with our specialist
Share your name and number — we'll call you back within 30 minutes to schedule your consultation.
Know the cost before you commit
An itemised estimate, plus a check of which schemes you may qualify for.
What do the medical terms on your prescription mean?
- G-CSF
- Granulocyte colony-stimulating factor — the class of medicines growth factor injections belong to. They copy a protein your body makes naturally to stimulate bone marrow activity.
- Neutrophil
- The type of white blood cell that fights bacterial infections. Chemotherapy reduces neutrophil numbers, which is the main reason growth factor injections are prescribed.
- Neutropenia
- A lower-than-normal neutrophil count. When neutropenia is severe, even a minor infection can escalate quickly and may require hospital admission.
- Febrile neutropenia
- A fever occurring when your neutrophil count is very low. This is a medical emergency. If you develop a fever during your low-count period, go to hospital immediately — do not wait for a callback.
- Nadir
- The lowest point your white cell count reaches after a chemotherapy cycle. Growth factor injections are timed to help your counts recover before your nadir becomes dangerous.
What should you do about the bone pain from these injections?
- Tell your oncologist or nurse how bad the bone pain was before your next cycle — they can advise what is safe for you to take.
- Note when the pain starts and when it eases, so your team can help you prepare better for future cycles.
- Do not take any painkiller without checking with your team first — some common medicines, including ibuprofen, interact with chemotherapy or affect blood counts.
- Continue your injection schedule unless your oncologist specifically tells you to stop.
- Go to hospital immediately if you develop a fever — a temperature rise during your low white cell period is a medical emergency.
- Ask your team at your next appointment whether a different formulation might produce less pain for you.
Explore 95 more Understanding Chemotherapy, Myths & Trials topics
Types & Classes of Chemotherapy
- Alkylating Agent Chemotherapy: What to Expect
- Anthracycline Chemotherapy: What to Expect
- Antimetabolite Chemotherapy: What to Expect
- Biosimilars in Cancer Treatment
- Can Your Chemotherapy Be Changed Partway Through?
- Generic vs Innovator Chemotherapy Drugs
- Growth Factor Injections After Chemotherapy
- Platinum-Based Chemotherapy: What to Expect
- Single-Agent vs Combination Chemotherapy
- Supportive Medicines Given With Chemotherapy
- Taxane Chemotherapy: What to Expect
- Topoisomerase Inhibitor Chemotherapy: What to Expect
- Types of Chemotherapy: The Main Classes Explained
- Vinca Alkaloid Chemotherapy: What to Expect
- What Is Dose-Dense Chemotherapy?
- What Is Metronomic Chemotherapy?
- What Is a Chemotherapy Regimen?
- Why Am I Given Steroids With Chemotherapy?
- Why the Class of Chemotherapy Decides Your Side Effects
Does Chemotherapy Work? Realistic Expectations
- Can Chemotherapy Be Avoided With a Genomic Test?
- Can Chemotherapy Cure Cancer?
- Can You Stop Chemotherapy Midway?
- Chemotherapy When You Are Already Very Unwell
- Chemotherapy or Surgery First: How Is It Decided?
- Do Worse Side Effects Mean It Is Working Better?
- Does Chemotherapy Actually Work?
- Does Everyone React the Same Way to Chemotherapy?
- Getting Palliative Care Alongside Chemotherapy
- How Will I Know It Is Working?
- Is Chemotherapy Worth the Side Effects?
- Is Palliative Chemotherapy Worth Having?
- Is There an Alternative to Chemotherapy?
- Reduced-Dose Chemotherapy: When Is It Offered?
- What Does Palliative Chemotherapy Mean?
- What If Chemotherapy Does Not Work?
HUB — Chemotherapy Myths and Alternative Treatment Claims
HUB — What Is Chemotherapy and Why Has It Been Advised?
Is This Chemotherapy? Hormone and Targeted Therapy
- Are EGFR Tablets Like Gefitinib Chemotherapy?
- Are Steroids Chemotherapy?
- Chemotherapy vs Hormone Therapy
- Chemotherapy vs Immunotherapy
- Chemotherapy vs Targeted Therapy
- Do You Lose Your Hair on Every Cancer Medicine?
- Is Capecitabine Chemotherapy? Yes, and Why It Matters
- Is Every Cancer Medicine Chemotherapy?
- Is Imatinib Chemotherapy?
- Is Letrozole or Anastrozole Chemotherapy?
- Is Tamoxifen Chemotherapy?
- Which Precautions Apply to Which Treatment?
Myths & Alternative Treatment Claims
- Can Ayurveda Treat Cancer Instead of Chemotherapy?
- Can You Use Traditional Medicine Alongside Chemotherapy?
- Cannabis Oil and Cancer Treatment Claims
- Chemotherapy Myths in Telugu Households
- Do Cow Urine, Wheatgrass and Home Remedies Treat Cancer?
- Does Chemotherapy Kill You? The Evidence
- Homeopathy and Cancer Treatment Claims
- How to Spot a Fake Cancer Cure
- Is Chemotherapy Worse Than the Cancer?
- Myth: Chemotherapy Destroys Your Immunity Forever
- Myth: Chemotherapy Is Contagious or Dangerous to Others
- Myth: Chemotherapy Is Just a Money-Making Business
- Myth: Chemotherapy Means the Cancer Is Terminal
- Myth: Chemotherapy Patients Must Be Isolated
- Myth: Chemotherapy Spreads Cancer or Causes New Cancers
- Myth: Everyone Loses All Their Hair
- Myth: Once You Start Chemotherapy You Cannot Stop
- Myth: You Cannot Eat Anything During Chemotherapy
- Naturopathy, Detox and Alkaline Diet Claims
- Talking to a Family Member Who Refuses Chemotherapy
- What Happens If You Refuse Chemotherapy?
- Why Do People Believe Chemotherapy Does Not Work?
Understanding Chemotherapy & Why It Is Advised
- Can Chemotherapy Be Refused or Delayed?
- Can I Get a Second Opinion Before Starting?
- Chemotherapy After Surgery: Why It Is Needed
- Chemotherapy Before Surgery: Why It Is Given First
- Chemotherapy Terminology: A Plain-English Glossary
- Chemotherapy for a Cancer That Has Come Back
- Chemotherapy in a Clinical Trial
- Chemotherapy vs Targeted Therapy vs Immunotherapy
- Consent for Chemotherapy: What You Are Signing
- Curative, Adjuvant, Neoadjuvant and Palliative: What Your Intent Means
- Does Chemotherapy Mean My Cancer Is Advanced?
- How Long Does a Course of Chemotherapy Last?
- How Many Cycles of Chemotherapy Will I Need?
- Is Chemotherapy Painful?
- Questions to Ask Before Starting Chemotherapy
- What Chemotherapy Cannot Do
- What Happens Inside Your Body During Chemotherapy?
- What Is Chemoradiation?
- What Is Chemotherapy and How Does It Work?
- What Is Maintenance Chemotherapy?
- Who Decides Your Chemotherapy Plan?
- Why Has Chemotherapy Been Advised for Me?
- Why Is Chemotherapy Given in Cycles?
- Your Chemotherapy Plan Sheet: How to Read It
Still not sure what applies to you?
Send your reports across and a senior medical oncologist will go through what they mean, what is known, and what the options actually are.
Frequently asked questions
Why wasn't I told the bone pain would be this bad?
Under-warning about G-CSF bone pain is a recognised gap in how chemotherapy side effects are explained. NCCN and ASCO both list musculoskeletal pain as a common, expected effect, and some patients experience it as severe. Being caught off guard is not a sign something went wrong — it is a preparation gap your team should fill before your next cycle. At your next appointment, tell them exactly how bad it was. They can discuss what options exist to make the next round more manageable.
How long does the bone pain from the injection last?
The timing depends on which formulation you are receiving. With daily injections, pain tends to build across the days you are injecting and eases once the course ends. With the once-per-cycle long-acting injection, many patients describe a single episode that peaks in the days after the injection and then settles. Once you have been through one cycle, you will have a clearer sense of your own pattern. Tell your team what you experienced — they can help you prepare for the next cycle.
Do I have to have these injections, or can I refuse?
You can decline any treatment, but it is worth understanding the reason they were prescribed before deciding. Febrile neutropenia — a fever during a period of very low white cell counts — can require hospitalisation and may force a delay or dose reduction in your chemotherapy. Your oncologist can explain the specific risk level for your regimen and what the likely consequences of omitting the injections would be. That conversation will give you what you need to make an informed decision.
Can I take painkillers for the bone pain?
Some can be taken safely; others should be avoided. Anti-inflammatory medicines such as ibuprofen and diclofenac may increase bleeding risk if your platelet count is low. Antihistamines have been used in some centres to ease G-CSF-related bone pain, but whether that is appropriate for you is a question for your treating oncologist, not one to answer from a general source. Do not assume an over-the-counter medicine is safe just because it does not need a prescription. Ask before taking anything new.
Is bone pain a sign the injection is working?
Generally, yes. The pain comes from your bone marrow expanding its activity, which is exactly what the injection is intended to cause. It is not harming you, and it does not mean the cancer is spreading. However, if the pain is so severe that you cannot function, or if it comes with fever, difficulty breathing, or redness and swelling at the injection site, tell your team rather than assuming it is within the expected range. Severe reactions are uncommon but need to be assessed.
What if my white cell count is still low after finishing the injections?
If your count remains low, your oncologist will review the approach — which may mean adjusting the timing of the injections, considering a different formulation, or delaying your next chemotherapy cycle to allow more recovery time. Never adjust the injection schedule yourself. If you have any symptoms of infection between cycles — fever, chills, unusual fatigue, or a wound that is not healing — contact your team immediately rather than waiting for your next scheduled appointment.
Chemotherapy Topics
Browse our complete chemotherapy guide — 1133 pages on side effects, medicines, cost, daily life and care in Hyderabad. Tap any topic to read more.