Fulzos 250mg Injection: Complete Medicine Guide
Clinical Reference Standards: CDSCO (Central Drugs Standard Control Organisation), Indian Pharmacopoeia (IP) & WHO | Last Updated: September 2026
When to Call Your Doctor IMMEDIATELY
- Sudden swelling, pain, or redness in one leg
- Chest pain or difficulty breathing
- Severe allergic reaction with swelling of face, lips, or throat
- Yellowing of skin or eyes, dark urine, or severe abdominal pain
- Unusual bleeding or bruising that does not stop
- Severe headache with vision changes
- Fever with chills or signs of infection
If experiencing severe symptoms, call emergency services immediately.
What is faslomax 250mg injection used for?
This medicine is a prescription-only intramuscular injection containing fulvestrant 250 mg. It is used to treat hormone receptor-positive, HER2-negative advanced breast cancer in postmenopausal women. It works by blocking and degrading estrogen receptors in cancer cells, slowing tumor growth. It must be given by a healthcare professional.
- Generic Name: Fulvestrant (250mg)
- Manufacturer: GLS Pharma Ltd.
- Form: Allopathy
- Pregnancy Category: Consult doctor
- Prescription Required: Yes
🇮🇳 faslomax 250mg injection के बारे में (Hindi Summary)
उपयोग: यह दवा फुल्वेस्ट्रेंट 250 मिलीग्राम इंजेक्शन है, जिसका उपयोग हार्मोन रिसेप्टर-पॉजिटिव, HER2-नेगेटिव एडवांस्ड या मेटास्टेटिक ब्रेस्ट कैंसर के इलाज के लिए किया जाता है। यह आमतौर पर उन महिलाओं में दी जाती है जो रजोनिवृत्ति के बाद की अवस्था में हैं और जिनका कैंसर पहले के हार्मोन थेरेपी से ठीक नहीं हुआ है। यह दवा कैंसर कोशिकाओं में एस्ट्रोजन रिसेप्टर को ब्लॉक करती है और उसे नष्ट करती है, जिससे कैंसर कोशिकाओं की वृद्धि धीमी हो जाती है। यह दवा केवल एक योग्य डॉक्टर या नर्स द्वारा मांसपेशी में इंजेक्शन के रूप में दी जाती है। इसे घर पर स्वयं नहीं लगाया जा सकता।
साइड इफेक्ट्स: इस दवा के सामान्य दुष्प्रभावों में इंजेक्शन वाली जगह पर दर्द, मतली, उल्टी, कब्ज, दस्त, सिरदर्द, थकान, गर्म चमक और जोड़ों या मांसपेशियों में दर्द शामिल हैं। कुछ मरीजों में पैरों या हाथों में सूजन, भूख में कमी और नींद में गड़बड़ी भी हो सकती है। गंभीर लेकिन दुर्लभ दुष्प्रभावों में खून के थक्के बनना, गंभीर एलर्जी, और लिवर एंजाइम में बदलाव शामिल हैं। अगर आपको असामान्य रक्तस्राव, सांस लेने में कठिनाई, पैर में सूजन, या सीने में दर्द हो, तो तुरंत डॉक्टर से संपर्क करें।
सुरक्षा सलाह: यह दवा केवल अस्पताल या क्लिनिक में योग्य स्वास्थ्यकर्मी द्वारा ही दी जानी चाहिए। इसे घर पर स्वयं न लगाएं। अपने डॉक्टर को उन सभी दवाओं के बारे में बताएं जो आप ले रहे हैं, खासकर खून पतला करने वाली दवाएं। अगर आपको लिवर की समस्या, खून के थक्के बनने का इतिहास, या खून बहने की समस्या है, तो इलाज से पहले डॉक्टर को बताएं। गर्भवती होने से बचें और गर्भनिरोधक का इस्तेमाल करें। इलाज के दौरान लाइव टीके न लगवाएं। नियमित जांच और फॉलो-अप जरूर कराएं।
💊 faslomax 250mg injection Uses & Benefits
[{"condition":"Hormone receptor-positive, HER2-negative advanced or metastatic breast cancer in postmenopausal women","description":"This medicine is used as monotherapy for postmenopausal women with estrogen receptor-positive, HER2-negative advanced breast cancer whose disease has progressed after prior endocrine therapy.","evidence":"Well-established"},{"condition":"Combination therapy for advanced breast cancer","description":"This medicine is used in combination with certain targeted agents such as CDK4/6 inhibitors for the treatment of hormone receptor-positive, HER2-negative advanced or metastatic breast cancer.","evidence":"Well-established"},{"condition":"Neoadjuvant or adjuvant endocrine therapy in selected patients","description":"In some clinical settings, this medicine may be used as part of endocrine treatment strategies for hormone receptor-positive breast cancer, as determined by the treating oncologist.","evidence":"Emerging"}]
Off-label uses: [{"condition":"Endometrial cancer","description":"Fulvestrant has been explored in some hormone receptor-positive endometrial cancers, but this is not a standard approved use.","evidence":"Limited"},{"condition":"Ovarian cancer","description":"Occasional reports describe use in hormone-sensitive ovarian cancer, but robust evidence is lacking.","evidence":"Limited"}]
Primary treatment for: Hormone receptor-positive, HER2-negative advanced or metastatic breast cancer
Also treats: Postmenopausal breast cancer, Endocrine-resistant breast cancer
📋 Drug Information
| Generic Name(s) | Fulvestrant (250mg) |
| Brand Name | faslomax 250mg injection |
| Manufacturer | GLS Pharma Ltd. |
| Packaging / Form | Varies by brand (Allopathy) |
| Therapeutic Class | ANTI NEOPLASTICS |
| Action Class | Estrogen receptor antagonist |
| Route of Administration | Parenteral (intramuscular injection) |
| Storage | Store in a refrigerator at 2°C to 8°C. Do not freeze. Keep the pre-filled syringe or vial in its original carton to protect from light. Allow the syringe to reach room temperature before administration as per institutional protocol. |
| Shelf Life | Refer to the manufacturer's packaging for the exact shelf life. Do not use after the expiry date printed on the carton. |
| WHO Guideline | Not established from the available information. |
| ICMR Guideline | Not established from the available information. |
👨⚕️ Doctor's Practical Tips
Evidence-based practical advice from experienced clinicians
🔍 Is This Medicine Right for Your Symptom?
Educational reference. Always consult a doctor for diagnosis.
🔬 How This Medicine Works (Pharmacology)
Pharmacokinetics
How It Works
This medicine is a selective estrogen receptor degrader. It binds to the estrogen receptor with high affinity and blocks the receptor's ability to activate genes that drive breast cancer cell growth. In addition to blocking estrogen binding, it causes the receptor protein to be degraded and removed from the cancer cell. This dual action reduces the number of estrogen receptors available on tumor cells, which slows or stops the growth of hormone-dependent breast cancer cells. Because it does not require the enzyme aromatase to work, it remains effective even when other endocrine therapies have stopped working.
Mechanism Steps
💡 How to Take faslomax 250mg injection
Strength: 250 mg per injection (intramuscular)
Dosage Information
| Adult Dosage | The recommended adult dose of this medicine is 500 mg given intramuscularly on days 1, 15, and 29, followed by 500 mg once monthly thereafter. However, the product described here is a 250 mg strength, so two injections may be required to achieve the 500 mg dose. Dose must be individualized by a qualified clinician based on indication, age, weight, renal and hepatic function, and prior treatments. This medicine should only be administered by a healthcare professional. |
| Pediatric Dosage | Pediatric dosing is not established from available information. Consult a pediatric oncologist. |
| Elderly Dosage | No specific dose adjustment is required for elderly patients based on age alone. However, elderly patients may be more sensitive to side effects and should be monitored closely for liver function, bleeding, and cardiovascular events. |
| Renal Impairment | No dose adjustment is recommended for mild to moderate kidney impairment. Data are limited for severe kidney impairment, so use with caution and monitor closely. |
| Hepatic Impairment | No dose adjustment is recommended for mild to moderate liver impairment. In severe liver impairment, this medicine should be used with caution because clearance may be reduced. Monitor liver function closely. |
| Maximum Daily Dose | The maximum recommended dose is 500 mg per month after the loading phase, but the exact dose and schedule must be determined by the treating oncologist. |
Dosage Timeline
🍽️ Food Timing Guide
⏰ What to Do If You Miss a Dose
⚠️ Side Effects of faslomax 250mg injection
✅ Common Side Effects
🚨 Serious Side Effects
⚠️ Rare Side Effects
Consult your doctor if you experience any unusual symptoms.
🔬 Drug Interactions
| Drug | Severity | Effect |
|---|---|---|
| Warfarin | Major | |
| Rifampicin | Major | |
| Ketoconazole | Moderate | |
| Carbamazepine | Moderate | |
| Phenytoin | Moderate | |
| St John's wort | Moderate | |
| Live vaccines | Moderate | |
| Anticoagulants other than warfarin | Major | |
| Corticosteroids | Minor | |
| Paracetamol | Minor |
🚨 Major Interactions
- Warfarin and other anticoagulants
- Rifampicin
⚡ Moderate Interactions
- CYP3A4 inhibitors such as ketoconazole
- CYP3A4 inducers such as carbamazepine
🍷 Alcohol Interaction
Alcohol is not directly contraindicated with this medicine, but it can worsen liver strain, fatigue, and nausea. Patients receiving treatment for advanced breast cancer are generally advised to limit or avoid alcohol to support overall health and liver function.
🔎 Check Your Other Medicines
Educational tool. Always confirm with your doctor or pharmacist.
🛡️ Safety & Warnings
🚫 Contraindications
["Known severe hypersensitivity to fulvestrant or any component of the formulation","Pregnancy","Breastfeeding","Severe liver impairment where the risk outweighs the benefit","Known bleeding disorders or low platelet count that increases injection risk"]
⚠️ Warnings & Precautions
["This medicine must be administered by a healthcare professional only.","Use with caution in patients with bleeding disorders or those on anticoagulants.","Monitor liver function regularly during treatment.","Advise patients to use effective non-hormonal contraception during treatment.","Avoid live vaccines during treatment without specialist advice.","Report any signs of blood clots immediately.","Use with caution in patients with severe kidney impairment due to limited data.","Injection site reactions should be assessed if they worsen or persist."]
🤱 Lactation Safety
It is not known whether this medicine passes into breast milk. Because of the potential for serious adverse effects in a nursing infant, breastfeeding is not recommended during treatment and for a period after the last dose as advised by the doctor.
💊 Overdose Management
There is no specific antidote for overdose with this medicine. In case of suspected overdose, treatment should be supportive and symptomatic. Patients should be monitored for side effects, and liver function and blood counts should be checked. Contact a poison control center or emergency department if a large dose is accidentally administered.
⏰ Missed Dose
If you miss a scheduled injection appointment, contact your treatment center as soon as possible to reschedule. Do not attempt to self-administer this medicine. Your doctor will advise on the best timing for the next dose based on your treatment schedule.
Additional Safety Advice
This medicine must only be given by a healthcare professional as an intramuscular injection, usually into the buttock, and never self-administered at home. Inform your doctor about all medicines you take, especially blood thinners such as warfarin, because the risk of bleeding may increase. Tell your treatment team if you have liver problems, a history of blood clots, or low platelet counts before receiving this medicine. Use effective non-hormonal contraception during treatment if you could become pregnant, and avoid becoming pregnant while on this medicine because it can harm an unborn baby. Do not receive live vaccines without consulting your oncologist. Report any unusual bruising, bleeding, leg swelling, chest pain, or difficulty breathing immediately. Keep all scheduled appointments for blood tests and imaging so your response to treatment can be monitored safely.
👴 Special Considerations for Elderly
💡 For Patients Above 65
Elderly patients may be more susceptible to side effects such as fatigue, hot flushes, and cardiovascular events. Regular monitoring of liver function, kidney function, and blood counts is advised. Dose adjustment is not typically required based on age alone, but individual assessment is important.
🤰 Pregnancy Planning (TTC)
This medicine can harm an unborn baby. Women of childbearing potential should use effective non-hormonal contraception during treatment and for a period after the last dose as advised by their doctor. If you are planning pregnancy, discuss with your oncologist well in advance.
🏥 Post-Surgery Considerations
If you are scheduled for surgery, inform your surgeon and oncologist that you are receiving this medicine. It may need to be temporarily stopped before surgery due to bleeding risk. Follow your doctor's instructions regarding timing of the next dose.
🦷 Dental Procedures
Inform your dentist that you are receiving this medicine, especially if you are on blood thinners. There may be an increased risk of bleeding during dental procedures. Your dentist may consult with your oncologist before proceeding.
💚 Lifestyle Tips for Better Results
🏋️ Exercise Considerations
Gentle, low-impact exercise is generally encouraged to maintain mobility and reduce fatigue. However, avoid strenuous activities that could increase the risk of bleeding or injury, especially if you have low platelet counts or are on blood thinners. Consult your doctor before starting any new exercise routine.
🥗 Diet Recommendations
💼 Impact on Daily Work & Life
Most patients can continue their daily activities, but fatigue and hot flushes may affect work performance. Driving is generally safe unless you feel dizzy or excessively tired. Plan your injection appointments around your work schedule. Discuss any work-related concerns with your healthcare team.
🛑 When to Stop This Medicine
Do not stop this medicine without consulting your oncologist. Treatment duration depends on your response, side effects, and overall health. Your doctor will decide when to stop or change treatment based on regular assessments.
📅 Long-Term Use Effects
Long-term use of this medicine may lead to bone thinning and an increased risk of fractures due to reduced estrogen activity. Regular monitoring of bone health, liver function, and blood counts is recommended. Some patients may experience persistent fatigue, hot flushes, or joint pain. Your oncologist will assess the benefits and risks of continuing treatment periodically. Do not stop treatment without medical advice.
🌿 Non-Medicine Approaches
These can complement medicine but do not replace prescribed treatment.
Medicines like tamoxifen, anastrozole, or letrozole may be used depending on the cancer type and patient profile.
Evidence: Well-establishedCDK4/6 inhibitors or mTOR inhibitors may be combined with endocrine therapy in certain cases.
Evidence: Well-establishedMay be considered if hormone therapy is no longer effective or in aggressive disease.
Evidence: Well-established💉 Vaccination Considerations
💉 If You're Getting Vaccinated
Live vaccines should be avoided during treatment with this medicine because of potential immune suppression. Inactivated vaccines may be given, but response may be reduced. Consult your oncologist before receiving any vaccine.
📦 Storage Guide
✅ DO
Store in a refrigerator at 2°C to 8°C
❌ DON'T
Do not freeze
✅ DO
Keep in original carton to protect from light
❌ DON'T
Do not transfer to unmarked containers
✅ DO
Allow to reach room temperature before administration as per protocol
❌ DON'T
Do not use after the expiry date
✈️ Traveling with This Medicine
If you need to travel while receiving this medicine, plan your trips around your injection schedule. Carry your prescription and a letter from your doctor explaining that you are receiving an injectable anticancer medicine. This medicine is stored in a refrigerator, so if you need to carry it, use a proper cold pack and keep it in its original packaging. Check airline and customs regulations for carrying prescription medicines. Inform your treatment center in advance so they can help coordinate your next dose at your destination if needed.
💰 Cost Analysis & Savings
👥 Real Patient Stories
Educational, anonymized scenarios. Individual results may vary.
💬 Questions Patients Often Ask
A: This medicine begins working within days, but measurable tumor response may take several weeks to months. Your doctor will monitor your progress with regular scans and tests.
A: No, this medicine must be given by a healthcare professional as an intramuscular injection in a clinical setting.
A: No, this medicine is an endocrine therapy known as a selective estrogen receptor degrader. It works differently from traditional chemotherapy.
A: Hair loss is not a common side effect of this medicine. It is more commonly associated with traditional chemotherapy.
A: This medicine can harm an unborn baby. Use effective non-hormonal contraception during treatment and for the period advised by your doctor.
🤔 Common Patient Concerns
🔄 Substitutes for faslomax 250mg injection
View AllAlternative brands with exact same active ingredient:
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fulveser injectionSamarth Life Sciences Pvt Ltd ₹7,425.00 36.7% CHEAPER
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celvestrant pfs injectionCelon Laboratories Ltd ₹10,208.87 13% CHEAPER
-
fulvant injectionArechar Healthcare ₹12,314.06 4.9% COSTLIER
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fulviglen 250mg injectionGlenmark Pharmaceuticals Ltd ₹12,400.00 5.6% COSTLIER
-
strantas 250mg injectionIntas Pharmaceuticals Ltd ₹12,468.00 6.2% COSTLIER
Medical Note: Always consult your doctor before switching medications.
🛑 Myths vs. Facts
- Myth: This medicine is a chemotherapy that causes hair loss.
Fact: This medicine is an endocrine therapy, not traditional chemotherapy. Hair loss is not a common side effect. - Myth: This medicine can be self-injected at home.
Fact: This medicine must be given by a healthcare professional as an intramuscular injection. - Myth: This medicine works for all types of breast cancer.
Fact: This medicine is only effective for hormone receptor-positive breast cancer. It is not used for hormone receptor-negative disease. - Myth: Once you start this medicine, you can stop anytime.
Fact: Treatment duration is decided by your oncologist based on response and tolerance. Do not stop without medical advice.
🔄 Alternative Options
Generic Alternatives
- Fulvestrant 250 mg injection
Brand Alternatives
- Fulzos 250mg injection