Product image of Nibestan (Exemestane) supplied by GNH India

Nibestan

Active Ingredient:
Exemestane
Origin:
EU

Nibestan (Exemestane)

Exemestane, the active ingredient in Nibestan, is an aromatase inhibitor presented as an oral tablet for oral administration. It is indicated for hormone receptor‑positive breast cancer in postmenopausal women, where it lowers systemic estrogen levels and thereby helps to slow or stop the growth of estrogen‑dependent tumor cells.

GNH India supplies Nibestan as a licensed, GDP‑compliant product to hospitals, oncology centres, pharmacies and clinics worldwide, adhering to international quality standards and regulatory requirements, including batch release testing and cold‑chain logistics where required.

Manufacturer / TM Owner

Wave Pharma S.R.L.

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Indications & Clinical Uses

Exemestane is an aromatase inhibitor used in hormone‑driven breast cancer therapy.

  • Hormone receptor‑positive breast cancer (postmenopausal): Reduces estrogen‑driven tumor progression.
  • Early‑stage breast cancer (adjuvant setting): Decreases risk of disease recurrence after surgery.
  • Metastatic breast cancer: Provides systemic estrogen suppression for disease control.
  • Advanced breast cancer after tamoxifen failure: Offers an alternative estrogen‑lowering strategy.

How It Works

  • Exemestane binds irreversibly to the aromatase enzyme, permanently inactivating it and preventing the conversion of androgens to estrogens. This leads to a sustained reduction in circulating estrogen levels, limiting the hormonal stimulation of estrogen‑dependent breast cancer cells and thereby inhibiting tumor growth.

Side Effects

Exemestane may cause a range of adverse reactions.

Common Side Effects

  • Hot flashes: Sudden feeling of warmth and sweating.
  • Joint and muscle pain: Discomfort in joints or muscles.
  • Fatigue: Persistent tiredness not relieved by rest.
  • Nausea: Mild to moderate upset stomach.
  • Headache: Pressure or throbbing pain in the head.
  • Decreased bone mineral density: Reduced bone strength over time.

Serious or Rare Side Effects

  • Deep vein thrombosis: Blood clot formation in deep veins.
  • Pulmonary embolism: Blockage of lung arteries by a clot.
  • Severe liver injury: Elevated liver enzymes or hepatitis.
  • Osteoporotic fractures: Breaks due to weakened bones.
  • Severe allergic reaction: Rash, swelling, or breathing difficulty.
  • Hypercholesterolemia: Marked increase in blood cholesterol levels.

Precautions & Warnings

Before starting Exemestane, several safety considerations are recommended.

  • Assess bone health: Monitor bone mineral density and consider calcium/vitamin D supplementation.
  • Evaluate liver function: Perform baseline liver enzyme tests and repeat as needed.
  • Avoid use in pregnancy: Category D; contraindicated in pregnant women.
  • Review cardiovascular risk: Consider history of thrombosis or clotting disorders.
  • Monitor lipid profile: Check cholesterol levels periodically.
  • Store at ambient temperature: Keep in original container, protect from moisture and light.

Avoid Interactions

Exemestane can interact with other medicines, requiring careful management.

Major Interactions (Avoid)

  • Estrogen replacement therapy: Counteracts estrogen‑lowering effect.
  • Strong CYP3A4 inducers (e.g., rifampin): May reduce drug exposure.
  • Tamoxifen: Potential antagonistic hormonal effects.

Moderate Interactions (Monitor Closely)

  • Antifungal agents (e.g., ketoconazole): May increase plasma levels.
  • Selective serotonin reuptake inhibitors (SSRIs): Possible effect on hormone metabolism.
  • Warfarin: May alter anticoagulant response; monitor INR.

Frequently Asked Questions

Nibestan contains the active ingredient exemestane, an aromatase inhibitor prescribed for hormone receptor‑positive breast cancer in postmenopausal women. It works by lowering estrogen levels, which can help slow or stop the growth of estrogen‑dependent tumors.

Exemestane irreversibly binds to the aromatase enzyme, blocking the conversion of androgens to estrogen. This permanent inhibition reduces circulating estrogen, depriving hormone‑sensitive breast cancer cells of the growth signal they require.

The prescribed dose of Nibestan is determined by the treating physician based on the patient’s clinical condition, treatment stage, and individual health factors. Patients should follow the exact dosing instructions provided by their healthcare professional.

Exemestane is classified as Pregnancy Category D, indicating evidence of risk to the fetus. It is contraindicated in pregnant women and should not be used while breastfeeding, as it may pass into breast milk and affect the infant.

To request Nibestan, submit an enquiry on the product page at gnhindia.com, specifying the required quantity. GNH India works with hospitals, pharmacies and procurement teams worldwide, verifies trade or institutional credentials, and then provides pricing, availability, shipping details and any necessary import documentation.

Nibestan (exemestane) is a steroidal, irreversible aromatase inhibitor, whereas drugs like letrozole and anastrozole are non‑steroidal and reversible. The irreversible binding of exemestane may offer a different safety and efficacy profile, but choice of therapy depends on individual patient factors and physician judgment.

Store Nibestan at ambient temperature, below 25 °C. Keep the tablets in the original packaging, protect them from moisture, heat and direct sunlight to maintain potency throughout the shelf life.

Nibestan is taken orally, usually as a tablet swallowed whole with water. It is typically taken once daily, preferably at the same time each day, but patients should follow the specific instructions given by their prescriber.

Serious risks include deep vein thrombosis, pulmonary embolism, severe liver injury, osteoporotic fractures, and rare allergic reactions. Patients should be monitored for signs of clotting, liver dysfunction, and bone health, and report any severe symptoms to their healthcare provider promptly.

Nibestan should not be used by pregnant women, individuals with known hypersensitivity to exemestane, patients with severe liver impairment, or those with a history of thromboembolic events unless specifically advised by a physician.

Published by

GNH India Pharmaceuticals Limited

Licensed pharmaceutical supplier

Last updated:

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