Filgrastim
Filgrastim is used to treat preventing infections during chemotherapy by boosting white blood cells. It is available as Neupogen and is commonly prescribed in the oncology category.
About Filgrastim
Filgrastim is a recombinant granulocyte colony-stimulating factor (g-csf) also known by the brand name Neupogen. It is primarily used to filgrastim is prescribed to treat: • Preventing infections during chemotherapy by boosting white blood cells • Various related conditions in the oncology category • Associated symptoms and complications It is an important medication that helps manage these conditions effectively. Filgrastim is available in subcutaneous / iv solution, single-dose vial (300 mcg/ml, 480 mcg/1.6 ml) and subcutaneous prefilled syringe (300 mcg/0.5 ml, 480 mcg/0.8 ml) form. Healthcare providers commonly prescribe Filgrastim for conditions including Attention Deficit Hyperactivity Disorder (ADHD), Lupus Anticoagulant, and Vertigo.
Filgrastim at a Glance
- Brand names
- Neupogen
- Drug class
- Recombinant Granulocyte Colony-Stimulating Factor (G-CSF)
- Pregnancy category
- FDA Category Category C — Animal studies have shown adverse fetal effects, including embryo loss at doses higher than human therapeutic doses. There are no adequate well-controlled studies in pregnant women. Use during pregnancy only if the potential benefit justifies the potential risk to the fetus, typically in the setting of life-threatening neutropenia.
- Available forms
- Subcutaneous / IV solution, single-dose vial (300 mcg/mL, 480 mcg/1.6 mL), Subcutaneous prefilled syringe (300 mcg/0.5 mL, 480 mcg/0.8 mL)
- Therapeutic categories
- Oncology, Supportive Care, Growth Factors
- Conditions treated
- 3 related conditions on this site
What Filgrastim Is Used For
Filgrastim is prescribed to treat:
• Preventing infections during chemotherapy by boosting white blood cells • Various related conditions in the oncology category • Associated symptoms and complications
It is an important medication that helps manage these conditions effectively.
Dosage Quick Reference
These are general dosage guidelines for Filgrastim. Your doctor will determine the appropriate dose for your specific situation.
| Condition | Starting Dose | Maintenance Dose |
|---|---|---|
| Chemotherapy-induced neutropenia | 5 mcg/kg/day SC or IV | Continue daily until ANC > 10,000/mm³; start 24 hours after chemo |
| Bone marrow transplant | 10 mcg/kg/day IV infusion | Adjust based on neutrophil response |
| Peripheral blood progenitor cell mobilization | 10 mcg/kg/day SC | Continue 4–7 days; start at least 4 days before first apheresis |
| Severe chronic neutropenia (congenital) | 6 mcg/kg SC twice daily | Individualized to maintain ANC 1,500–10,000/mm³ |
| Severe chronic neutropenia (idiopathic/cyclic) | 5 mcg/kg/day SC | Individualized; titrate to clinical response |
| Acute radiation syndrome (Hematopoietic Subsyndrome) | 10 mcg/kg/day SC | Continue until ANC > 1,000/mm³ on three consecutive CBCs |
Side Effects
Common side effects may include:
• Nausea or stomach upset • Headache • Dizziness or lightheadedness • Fatigue or tiredness • Mild rash or itching
Serious side effects (seek immediate medical attention):
• Severe allergic reactions (rash, hives, swelling, difficulty breathing) • Unusual bleeding or bruising • Severe stomach pain • Signs of liver problems (yellowing of skin/eyes, dark urine) • Chest pain or irregular heartbeat • Severe dizziness or fainting • Signs of serious adverse effects
See also: Drug Interactions ↓
Drug Interactions
Filgrastim has relatively few drug interactions, but the combinations below require careful consideration.
- Cytotoxic chemotherapy: Filgrastim should not be administered within the 24 hours before or after cytotoxic chemotherapy because rapidly dividing myeloid cells are particularly sensitive to chemotherapy. Concurrent use may worsen neutropenia rather than prevent it.
- Lithium: May potentiate filgrastim release of neutrophils, leading to exaggerated leukocytosis. Monitor neutrophil counts more frequently when these agents are used together.
- 5-fluorouracil: Pre-clinical and clinical data suggest enhanced myelosuppression when filgrastim is administered too close to 5-FU. Maintain at least a 24-hour separation between agents.
- Bleomycin: Case reports describe pulmonary toxicity with concurrent filgrastim and bleomycin. Use cautiously and monitor for new respiratory symptoms.
- Live vaccines: Although not a direct pharmacokinetic interaction, immunocompromised patients receiving filgrastim should generally avoid live vaccines while neutropenic. Coordinate vaccination timing with the oncology team.
See also: Questions to Ask Your Doctor ↓
Key Considerations
Known drug interactions
Filgrastim has documented interactions with other medications, supplements, and certain foods. Review the Drug Interactions section below and tell your healthcare provider about every medication you take, including over-the-counter products. Jump to section →
Multiple forms available
Filgrastim comes in more than one form (Subcutaneous / IV solution, single-dose vial (300 mcg/mL, 480 mcg/1.6 mL), Subcutaneous prefilled syringe (300 mcg/0.5 mL, 480 mcg/0.8 mL)). The right form for you depends on your condition, ease of use, and your provider's recommendation.
Additional Information
What is Filgrastim?
Filgrastim (generic name: Filgrastim) is a medication primarily used to treat preventing infections during chemotherapy by boosting white blood cells. It is marketed under the brand name(s) Neupogen and belongs to the Oncology category of medications.
How Does Filgrastim Work?
Filgrastim works through several mechanisms to provide therapeutic benefits:
- Acts on specific receptors or pathways in the body
- Modulates biological processes related to the treated condition
- Provides symptom relief and improves quality of life
- Helps manage the underlying condition effectively
- Works best when combined with appropriate lifestyle modifications
The medication is designed to target the specific pathways involved in preventing infections during chemotherapy by boosting white blood cells, making it an effective treatment option.
Common Uses
Primary Indications
Filgrastim is commonly prescribed for:
- Preventing infections during chemotherapy by boosting white blood cells: The main indication for this medication
- Related Conditions: Associated symptoms and complications
- Prevention: May help prevent progression of certain conditions
- Symptom Management: Reduces discomfort and improves daily function
Additional Uses
In some cases, Filgrastim may also be prescribed for:
- Off-label uses as determined by your healthcare provider
- Combination therapy with other medications
- Long-term management of chronic conditions
- Short-term treatment of acute symptoms
Dosage and Administration
Filgrastim dosing varies based on the specific condition being treated and individual patient factors.
Typical Dosing:
- Starting dose is typically determined by your healthcare provider
- May be adjusted based on response and tolerability
- Can be taken with or without food (follow specific instructions)
- Usually taken once or twice daily
Administration Tips:
- Take at the same time(s) each day for best results
- Swallow tablets/capsules whole unless instructed otherwise
- Don't skip doses
- Complete full course of treatment as prescribed
- Follow your doctor's specific instructions carefully
Important Safety Information
Who Should Not Take Filgrastim?
Do not take Filgrastim if you:
- Are allergic to Filgrastim or any ingredients
- Have certain medical conditions (discuss with your doctor)
- Are taking medications that interact with Filgrastim
- Have severe liver or kidney disease (without dose adjustment)
Drug Interactions
Inform your doctor about all medications you take, including:
- Prescription medications
- Over-the-counter drugs
- Vitamins and supplements
- Herbal products
Some medications may interact with Filgrastim, affecting its efficacy or increasing side effect risk.
Pregnancy and Breastfeeding
Pregnancy:
- Discuss risks and benefits with your doctor if pregnant or planning pregnancy
- May require special monitoring or dose adjustments
- Some medications should be avoided during pregnancy
Breastfeeding:
- Consult your doctor about safety while breastfeeding
- May pass into breast milk
- Benefits and risks should be carefully considered
Monitoring and Follow-Up
While taking Filgrastim, your doctor may monitor:
- Effectiveness of treatment (symptom improvement)
- Side effects or adverse reactions
- Laboratory values if applicable
- Blood pressure, heart rate, or other vital signs as appropriate
- Overall response to therapy
Regular follow-up appointments are important to ensure the medication is working properly and to make any necessary adjustments.
Managing Side Effects
Most side effects are mild and improve with time. Here are strategies for common side effects:
Gastrointestinal Upset
- Take with food if allowed
- Stay well hydrated
- Eat smaller, more frequent meals
- Report persistent nausea or vomiting
Dizziness
- Rise slowly from sitting or lying positions
- Avoid sudden movements
- Stay hydrated
- Avoid alcohol
- Report severe or persistent dizziness
Fatigue
- Get adequate rest
- Maintain regular sleep schedule
- Exercise as tolerated
- Report excessive tiredness that interferes with daily activities
Lifestyle Considerations
To maximize the benefits of Filgrastim:
- Follow a healthy, balanced diet
- Exercise regularly as recommended by your doctor
- Maintain a healthy weight
- Avoid alcohol or limit consumption
- Don't smoke
- Manage stress through relaxation techniques
- Get adequate sleep
- Stay well hydrated
- Keep all follow-up appointments
- Take medication consistently as prescribed
When to Contact Your Doctor
Seek immediate medical attention if you experience:
- Signs of severe allergic reaction (difficulty breathing, severe rash, swelling)
- Chest pain or rapid heartbeat
- Severe dizziness or fainting
- Unusual bleeding or bruising
- Signs of liver problems (yellowing of skin/eyes, dark urine, severe fatigue)
- Severe stomach pain
- Any symptoms that concern you
Contact your doctor for non-emergency issues:
- Mild to moderate side effects that persist
- Questions about your medication
- Concerns about effectiveness
- New medications prescribed by another doctor
- Scheduled surgery or dental procedures
- Planning pregnancy
Storage
Store Filgrastim at room temperature (68-77°F or 20-25°C) away from light, heat, and moisture. Keep in original container. Keep out of reach of children and pets. Do not use past expiration date.
Important Reminders
- Take exactly as prescribed by your doctor
- Don't stop suddenly without medical advice
- Keep all follow-up appointments
- Report any unusual symptoms
- Don't share medication with others
- Store safely away from children
- Check expiration dates
- Ask your pharmacist if you have questions
Clinical Benefits
When used appropriately, Filgrastim provides several benefits:
- Effective management of preventing infections during chemotherapy by boosting white blood cells
- Improvement in quality of life
- Reduction in symptoms
- Prevention of complications
- Generally well-tolerated when used as directed
- Backed by clinical research and extensive use
Disclaimer: This information is for educational purposes only and is not intended to replace professional medical advice, diagnosis, or treatment. Always consult your physician or other qualified healthcare provider with any questions about a medical condition or medication.
Frequently Asked Questions
Questions to Ask Your Doctor About Filgrastim
Consider discussing these topics at your next appointment:
- Why is filgrastim recommended for my regimen, and what reduction in infection risk can I expect?
- How will we monitor my blood counts and decide when to stop filgrastim each cycle?
- How should I manage bone pain if it develops?
- What signs of infection should prompt me to call you immediately, even while on filgrastim?
- Is the prefilled syringe or vial the best option for me, and can I administer doses at home?
Medical Disclaimer: This information is for educational purposes only and should not be considered medical advice. Always consult with your healthcare provider before starting, stopping, or changing any medication. Your doctor can provide personalized recommendations based on your specific health condition and medical history.