gynact 4mg injection - Leuprolide (4mg) medicine

Eurolide 4mg Injection (Leuprolide): Comprehensive Medicine Guide

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🏭 Bharat Serums & Vaccines Ltd 📦 Varies by brand 💊 Allopathy 📅 Updated: Oct 25, 2026
🤰 Pregnancy Category Leuprolide is contraindicated in pregnancy. It may cause fetal harm. Effective non-hormonal contraception should be used during treatment and for at least 2 months after the last dose. 📋 Prescription Required 💊 Generic Available
Medically Reviewed
11 min read
Evidence: Well-established for approved indications.
Reviewed by
SaathiMed Expert Panel | Oct 25, 2026
🩺
Medically Fact-Checked & Clinically Verified by SaathiMed Clinical Review Board
Clinical Reference Standards: CDSCO (Central Drugs Standard Control Organisation), Indian Pharmacopoeia (IP) & WHO | Last Updated: September 2026

When to Call Your Doctor IMMEDIATELY

  • Difficulty breathing or swelling of face, lips, or throat
  • Severe chest pain or palpitations
  • Sudden weakness or numbness in limbs
  • Severe headache with vision changes
  • Yellowing of skin or eyes
  • Decreased urine output or inability to urinate
  • Severe abdominal pain

If experiencing severe symptoms, call emergency services immediately.

What is gynact 4mg injection used for?

This medicine is a GnRH agonist used to treat advanced prostate cancer, endometriosis, uterine fibroids, and central precocious puberty. It works by reducing testosterone and estrogen levels.

  • Generic Name: Leuprolide (4mg)
  • Manufacturer: Bharat Serums & Vaccines Ltd
  • Form: Allopathy
  • Pregnancy Category: Consult doctor
  • Prescription Required: Yes

🇮🇳 gynact 4mg injection के बारे में (Hindi Summary)

उपयोग: यह दवा ल्यूप्रोलाइड 4 मिलीग्राम इंजेक्शन के रूप में उपलब्ध है और इसका उपयोग मुख्य रूप से प्रोस्टेट कैंसर, एंडोमेट्रियोसिस, गर्भाशय फाइब्रॉएड और बच्चों में समय से पहले यौवन को रोकने के लिए किया जाता है। यह हार्मोन के स्तर को कम करके काम करती है।

साइड इफेक्ट्स: आम दुष्प्रभावों में गर्म लहरें, मूड में बदलाव, सिरदर्द, थकान और इंजेक्शन स्थल पर दर्द शामिल हैं। गंभीर दुष्प्रभाव दुर्लभ हैं लेकिन एलर्जी, हड्डियों की हानि और हृदय संबंधी समस्याएं हो सकती हैं।

सुरक्षा सलाह: यह दवा केवल डॉक्टर की देखरेख में ही लगवाएं। गर्भावस्था के दौरान इसका उपयोग न करें। उपचार के दौरान शराब से बचें। नियमित जांच कराते रहें।

💡 Did You Know? The first generic medicine was introduced in India in 1970 after the Patents Act was amended.

💊 gynact 4mg injection Uses & Benefits

[{"condition":"Advanced prostate cancer","description":"Used to lower testosterone levels, which helps slow the growth of prostate cancer cells.","evidence":"Well-established"},{"condition":"Endometriosis","description":"Helps reduce pain and lesions associated with endometriosis by lowering estrogen levels.","evidence":"Well-established"},{"condition":"Uterine fibroids","description":"Used preoperatively to shrink fibroids and reduce symptoms such as heavy bleeding.","evidence":"Well-established"},{"condition":"Central precocious puberty","description":"Used in children to delay early puberty by suppressing gonadotropin release.","evidence":"Well-established"}]

Off-label uses: [{"condition":"Breast cancer","description":"Sometimes used in premenopausal women with hormone receptor-positive breast cancer to suppress ovarian function.","evidence":"Limited"},{"condition":"Ovarian cancer","description":"Occasionally used in certain types of ovarian cancer, but evidence is limited.","evidence":"Limited"}]

Primary treatment for: Advanced prostate cancer

Also treats: Endometriosis, Uterine fibroids, Central precocious puberty

📋 Drug Information

Generic Name(s)Leuprolide (4mg)
Brand Namegynact 4mg injection
ManufacturerBharat Serums & Vaccines Ltd
Packaging / FormVaries by brand (Allopathy)
Therapeutic ClassGYNAECOLOGICAL
Action ClassGNRH agonists/analogue
Route of AdministrationParenteral (subcutaneous or intramuscular injection)
StorageStore refrigerated at 2°C to 8°C (36°F to 46°F). Do not freeze. Protect from light. Once dispensed, may be stored at room temperature for up to 30 days.
Shelf Life24 months from the date of manufacture.
WHO GuidelineNot established from the available information.
ICMR GuidelineNot established from the available information.

👨‍⚕️ Doctor's Practical Tips

Evidence-based practical advice from experienced clinicians

1
Administer the injection at the same time each day or as scheduled to maintain consistent hormone levels.
2
Rotate injection sites to prevent lipodystrophy and discomfort.
3
Monitor patients for initial tumor flare in prostate cancer, which may cause bone pain or urinary obstruction.
4
Consider calcium and vitamin D supplementation to mitigate bone loss with long-term use.
5
Regularly assess cardiovascular risk factors and blood glucose levels during therapy.
6
Educate patients about the importance of adherence and follow-up appointments.

🔍 Is This Medicine Right for Your Symptom?

Educational reference. Always consult a doctor for diagnosis.

✅
Hot flashes
This medicine commonly causes hot flashes due to hormone suppression.
Likely Use
✅
Injection site pain
Local reaction to the injection.
Likely Use
❌
Fever
This medicine is not a primary fever reducer.
Not Primary

🔬 How This Medicine Works (Pharmacology)

Pharmacokinetics

AbsorptionLeuprolide is rapidly and almost completely absorbed after subcutaneous or intramuscular administration. The absorption rate may vary depending on the injection site and formulation.
DistributionLeuprolide distributes into the extracellular space. It does not bind significantly to plasma proteins. The volume of distribution is not well established.
Protein BindingLeuprolide is approximately 43-49% bound to plasma proteins.
MetabolismLeuprolide is metabolized in the liver and possibly in the kidneys by peptidases to smaller inactive peptides.
Half-LifeThe elimination half-life of leuprolide is approximately 3 hours after a single dose.
ExcretionLeuprolide and its metabolites are primarily excreted in the urine.
BioavailabilityBioavailability after subcutaneous administration is approximately 94% compared to intravenous administration.
Onset of ActionInitial hormone surge occurs within hours; therapeutic suppression of testosterone or estrogen occurs within 2-4 weeks of continuous therapy.
Peak Plasma TimePeak plasma concentration is reached within 1-2 hours after subcutaneous administration.
Duration of ActionSuppression of gonadotropins lasts for the duration of therapy; after discontinuation, hormone levels return to normal over several weeks to months.

How It Works

Leuprolide is a synthetic nonapeptide analog of gonadotropin-releasing hormone (GnRH). It binds to GnRH receptors in the pituitary gland, initially causing an increase in luteinizing hormone (LH) and follicle-stimulating hormone (FSH) release. With continuous administration, it downregulates the receptors, leading to decreased LH and FSH secretion. This results in reduced production of testosterone in men and estrogen in women, which is the basis for its therapeutic effects in hormone-sensitive conditions.

Mechanism Steps

1
Binding to GnRH receptors: Leuprolide binds to GnRH receptors on the surface of pituitary gonadotrope cells.
2
Initial stimulation: This binding initially stimulates the release of LH and FSH, leading to a transient increase in sex hormones.
3
Receptor downregulation: With continuous exposure, the receptors become desensitized and downregulated, reducing their responsiveness to GnRH.
4
Suppression of gonadotropins: As a result, LH and FSH secretion decreases, leading to reduced production of testosterone and estrogen.
5
Therapeutic effect: The lowered hormone levels help treat hormone-sensitive conditions such as prostate cancer, endometriosis, and uterine fibroids.

💡 How to Take gynact 4mg injection

Strength: 4 mg injection

1This medicine is administered by a healthcare professional.
2It is given as a subcutaneous or intramuscular injection.
3The injection site should be rotated to prevent irritation.
4Do not self-administer unless you have been trained.
5Follow the prescribed schedule exactly.

Dosage Information

Adult DosageThe usual adult dose of this medicine is 4 mg administered as a subcutaneous or intramuscular injection once daily or as directed by the physician. For prostate cancer, a common regimen is 4 mg daily or 7.5 mg monthly, but the exact dose and frequency depend on the indication and formulation. Dose must be individualized by a qualified clinician based on indication, age, weight, renal and hepatic function.
Pediatric DosagePediatric dosing is not established from available information. Consult a pediatrician.
Elderly DosageNo specific dose adjustment is required for elderly patients, but they may be more susceptible to side effects such as bone loss and cardiovascular events. Monitor closely.
Renal ImpairmentNo dose adjustment is recommended for renal impairment, but use with caution.
Hepatic ImpairmentNo dose adjustment is recommended for hepatic impairment, but use with caution.
Maximum Daily DoseThe maximum recommended daily dose is 4 mg for the daily formulation. For depot formulations, the maximum monthly dose is 7.5 mg or as prescribed.

Dosage Timeline

🌅 Morning ❌ ☀️ Afternoon ❌ 🌆 Evening ❌ 🌙 Night ❌

🍽️ Food Timing Guide

With food
No specific timing required
This medicine is injected and not affected by food.
Alcohol
Avoid
May worsen side effects like hot flashes and mood swings.

⏰ What to Do If You Miss a Dose

📌 Less than half the dosing interval has passed
→ Take the missed dose as soon as you remember.
💡 Continue with the regular schedule.
📌 More than half the dosing interval has passed
→ Skip the missed dose.
💡 Do not double dose to catch up.

⚠️ Side Effects of gynact 4mg injection

✅ Common Side Effects

Hot flashes (Common (10-30%))
Dress in layers, avoid triggers like spicy food and caffeine. Consult doctor if severe.
Injection site pain (Common (5-15%))
Apply a cold pack to the site. Report if redness or swelling persists.
Mood swings (Common (5-10%))
Practice stress-reduction techniques. Seek support if mood changes are bothersome.
Fatigue (Common (5-10%))
Ensure adequate rest. Consult doctor if fatigue interferes with daily activities.
Headache (Common (5-10%))
Use over-the-counter pain relief if approved by your doctor. Report persistent headaches.

🚨 Serious Side Effects

Severe allergic reaction (anaphylaxis) (Rare (<0.1%))
Seek immediate medical attention if you experience difficulty breathing, swelling of face or throat, or rash.
Bone loss (osteoporosis) (Uncommon with long-term use)
Discuss calcium and vitamin D supplementation with your doctor. Regular bone density monitoring may be needed.
Cardiovascular events (e.g., heart attack, stroke) (Rare)
Seek emergency care if you experience chest pain, shortness of breath, or sudden weakness.
Pituitary apoplexy (Very rare)
Seek immediate medical attention if you have sudden severe headache, vision changes, or confusion.

⚠️ Rare Side Effects

Pituitary apoplexy
Seek immediate medical attention.
Spinal cord compression
Report sudden back pain, weakness, or numbness in legs.
Severe liver injury
Report yellowing of skin or eyes, dark urine, or abdominal pain.

Consult your doctor if you experience any unusual symptoms.

🔬 Drug Interactions

Drug Severity Effect
Degarelix Major
Amiodarone Major
Warfarin Moderate
Prednisone Moderate

🚨 Major Interactions

  • GnRH antagonists (e.g., degarelix)
  • Drugs that prolong QT interval (e.g., amiodarone, sotalol)

⚡ Moderate Interactions

  • Anticoagulants (e.g., warfarin)
  • Corticosteroids

🍷 Alcohol Interaction

Alcohol may worsen side effects such as hot flashes, mood swings, and fatigue. It is advisable to avoid or limit alcohol consumption while on this medicine.

🔎 Check Your Other Medicines

Educational tool. Always confirm with your doctor or pharmacist.

🛡️ Safety & Warnings

🚫 Contraindications

["Hypersensitivity to leuprolide or any component of the formulation","Pregnancy","Breastfeeding","Undiagnosed abnormal vaginal bleeding"]

⚠️ Warnings & Precautions

["May cause initial flare of symptoms in prostate cancer; monitor for spinal cord compression or urinary obstruction.","Long-term use may lead to bone loss; consider calcium and vitamin D supplementation.","May cause hyperglycemia; monitor blood glucose in diabetic patients.","May increase risk of cardiovascular events; use with caution in patients with heart disease.","Injection site reactions may occur; rotate injection sites."]

🤱 Lactation Safety

It is not known whether leuprolide is excreted in human breast milk. Because of the potential for serious adverse reactions in nursing infants, breastfeeding is not recommended during treatment.

💊 Overdose Management

Overdose is unlikely due to the injectable nature and medical supervision. In case of accidental overdose, seek immediate medical attention. Treatment is symptomatic and supportive.

⏰ Missed Dose

If you miss a dose, contact your healthcare provider as soon as possible to reschedule. Do not double the dose to catch up.

Additional Safety Advice

General Safety

This medicine must be administered by a healthcare professional. Do not attempt to self-inject unless you have been properly trained. Keep all appointments for monitoring, including blood tests to check hormone levels and prostate-specific antigen (PSA) in men. Use effective non-hormonal contraception during treatment and for a period after, as this medicine can harm a developing baby. Avoid alcohol as it may worsen side effects like hot flashes and mood changes. Inform your doctor if you have a history of heart disease, diabetes, or osteoporosis. Do not stop treatment without consulting your doctor, as abrupt discontinuation may cause symptoms to return.

👴 Special Considerations for Elderly

💡 For Patients Above 65

Elderly patients may be more susceptible to bone loss and cardiovascular events. Regular monitoring and preventive measures are recommended.

🤰 Pregnancy Planning (TTC)

This medicine is contraindicated during pregnancy. Women of childbearing potential should use effective non-hormonal contraception during treatment and for at least 2 months after the last dose. Consult your doctor if you plan to become pregnant.

🏥 Post-Surgery Considerations

Inform your surgeon about this medicine before any surgery. It may affect hormone levels and could interact with anesthetic agents.

🦷 Dental Procedures

No specific precautions, but inform your dentist about this medicine as it may affect bleeding risk or healing.

💚 Lifestyle Tips for Better Results

🏃
Maintain a healthy weight to reduce joint stress.
🥗
Engage in regular low-impact exercise like walking or swimming.
😴
Practice stress-reduction techniques such as yoga or meditation.
💧
Include calcium and vitamin D rich foods in your diet.
🧘
Get adequate sleep to support overall health.

🏋️ Exercise Considerations

Exercise is generally safe, but patients with bone loss should avoid high-impact activities. Consult your doctor before starting any new exercise regimen.

🥗 Diet Recommendations

Include calcium-rich foods like dairy and leafy greens.
Ensure adequate vitamin D through sunlight or supplements.
Limit caffeine and spicy foods to reduce hot flashes.
Stay well hydrated.

💼 Impact on Daily Work & Life

This medicine may cause fatigue or dizziness, which can affect driving or operating machinery. Patients should assess their ability to perform such tasks and avoid them if affected.

🛑 When to Stop This Medicine

Do not stop this medicine without consulting your doctor. Abrupt discontinuation may cause symptoms to return. Your doctor will determine the appropriate duration of therapy based on your condition.

📅 Long-Term Use Effects

Long-term use of this medicine may lead to bone loss, increased risk of cardiovascular events, and metabolic changes such as hyperglycemia. Regular monitoring of bone density, blood glucose, and cardiovascular health is recommended. The benefits of treatment should be weighed against these risks.

🌿 Non-Medicine Approaches

These can complement medicine but do not replace prescribed treatment.

GnRH antagonists

Alternative class of hormone therapy that suppresses hormones without initial surge.

Evidence: Well-established
Surgery

For certain conditions like uterine fibroids, surgery may be an option.

Evidence: Well-established

💉 Vaccination Considerations

💉 If You're Getting Vaccinated

No specific vaccine interactions are known. However, consult your doctor before receiving any live vaccines while on this medicine.

📦 Storage Guide

✅ DO

Store refrigerated at 2°C to 8°C

❌ DON'T

Do not freeze

✅ DO

Keep in original container

❌ DON'T

Do not transfer to unmarked containers

✅ DO

Protect from light

❌ DON'T

Do not store in direct sunlight

✈️ Traveling with This Medicine

Carry this medicine in its original packaging with a copy of your prescription. Store it in a cool, refrigerated condition if possible; if not, use a cooler bag with ice packs. Check airline regulations for carrying injectables. Adjust injection timing if crossing time zones, but consult your doctor first. Carry a medical letter explaining your condition and medication.

💰 Cost Analysis & Savings

👥 Real Patient Stories

Educational, anonymized scenarios. Individual results may vary.

👤 A 68-year-old man with advanced prostate cancer
He was started on this medicine as part of his treatment plan. After an initial increase in bone pain, his symptoms improved over several weeks. He experienced hot flashes but found relief by dressing in layers and avoiding caffeine.
💡 Lesson: Initial flare of symptoms is common and usually temporary. Adherence to the injection schedule is crucial for optimal outcomes.
👤 A 32-year-old woman with severe endometriosis
She received this medicine to manage chronic pelvic pain. After two months, her pain significantly decreased, but she experienced mood swings and vaginal dryness. Her doctor adjusted her treatment plan and recommended lifestyle modifications.
💡 Lesson: Side effects can be managed with supportive care and dose adjustments. Regular follow-up helps tailor treatment.

💬 Questions Patients Often Ask

Q: How long does it take to work?

A: Initial hormone surge occurs within hours, but therapeutic effects such as reduced testosterone or estrogen levels take about 2-4 weeks of continuous therapy.

Q: What should I do if I miss a dose?

A: Contact your healthcare provider as soon as possible to reschedule. Do not double the dose.

Q: Can I take this medicine if I am pregnant?

A: No, this medicine is contraindicated in pregnancy as it may harm the fetus.

🤔 Common Patient Concerns

💭 These are the concerns patients most commonly raise

  • Can I take this medicine long-term?
  • Will it affect my bone health?
  • Can I drive after taking this medicine?
  • Does it interact with my blood pressure medicine?
  • What if I miss a dose?
  • Can I drink alcohol while taking this?

🔄 Substitutes for gynact 4mg injection

View All

Alternative brands with exact same active ingredient:

Medical Note: Always consult your doctor before switching medications.

🛑 Myths vs. Facts

  • Myth: Leuprolide is a chemotherapy drug.
    Fact: Leuprolide is a hormone therapy, not chemotherapy. It works by reducing hormone levels.
  • Myth: Leuprolide can be taken orally.
    Fact: Leuprolide is only available as an injection because it would be destroyed in the stomach if taken orally.

🔄 Alternative Options

Generic Alternatives

  • Leuprolide acetate injection

Brand Alternatives

  • Lupron
  • Eligard
  • Viadur

📊 Comparison with Similar Medicines

[{"medicine":"Leuprolide","class":"GnRH agonist","route":"Injection","frequency":"Daily or monthly"},{"medicine":"Goserelin","class":"GnRH agonist","route":"Subcutaneous implant","frequency":"Monthly or every 3 months"},{"medicine":"Degarelix","class":"GnRH antagonist","route":"Subcutaneous injection","frequency":"Monthly"}]

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