Product image of Letrozol Viatris (Letrozole) supplied by GNH India

Letrozol Viatris

Active Ingredient:
Letrozole
Origin:
EU

Letrozol Viatris (Letrozole)

Letrozole, the active ingredient in Letrozol Viatris, is an aromatase inhibitor presented as an oral tablet for oral use. It is used to treat hormone receptor‑positive breast cancer in postmenopausal women. GNH India supplies Letrozol Viatris as a licensed, GDP‑compliant international pharmaceutical supplier serving hospitals, oncology centres, pharmacies and clinics worldwide.

Manufacturer / TM Owner

Viatris Limited

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Indications & Clinical Uses

Letrozol Viatris acts on estrogen‑dependent breast cancer pathways.

  • Adjuvant treatment of hormone receptor‑positive breast cancer in postmenopausal women: reduces risk of disease recurrence after surgery.
  • Metastatic hormone receptor‑positive breast cancer in postmenopausal women: slows disease progression and improves survival.
  • Neoadjuvant therapy for hormone receptor‑positive breast cancer in postmenopausal women: may shrink tumor size before definitive surgery.

How It Works

  • Letrozole reversibly binds to the aromatase enzyme, inhibiting its activity and thereby blocking the conversion of androgens to estrogens. This reduction in peripheral estrogen synthesis leads to markedly lower circulating estrogen levels, depriving estrogen‑dependent tumor cells of a growth stimulus and limiting tumor proliferation in postmenopausal patients.

Side Effects

Letrozol Viatris may cause a range of adverse reactions.

Common Side Effects

  • Hot flashes: transient episodes of increased warmth and sweating.
  • Arthralgia: joint pain or stiffness, often affecting knees and hips.
  • Fatigue: persistent tiredness not relieved by rest.
  • Nausea: mild to moderate upset stomach.

Serious or Rare Side Effects

  • Osteoporosis: decreased bone mineral density leading to fracture risk.
  • Venous thromboembolism: blood clots in deep veins or lungs.
  • Severe liver injury: marked elevation of hepatic enzymes or jaundice.

Precautions & Warnings

Before initiating Letrozol Viatris, consider the following safety measures.

  • Bone health assessment: evaluate baseline bone mineral density and consider calcium/vitamin D supplementation.
  • Cardiovascular monitoring: assess risk factors for thrombosis and monitor for signs of clot formation.
  • Liver function testing: obtain baseline hepatic enzymes and repeat periodically.
  • Drug interactions review: check concomitant medications for potential CYP2A6 or CYP3A4 interactions.
  • Pregnancy contraindication: do not use in pregnant or breastfeeding women; teratogenic risk is high.
  • Store at ambient temperature: keep below 25°C in the original packaging, protect from moisture and direct sunlight.

Avoid Interactions

Letrozol Viatris can interact with several medicines, requiring careful management.

Major Interactions (Avoid)

  • Strong CYP2A6 inducers (e.g., rifampin): may markedly reduce letrozole exposure and efficacy.
  • Estrogen‑containing hormonal therapies: antagonize the intended estrogen‑lowering effect.

Moderate Interactions (Monitor Closely)

  • CYP3A4 inhibitors (e.g., ketoconazole): may increase plasma levels, requiring monitoring for toxicity.
  • Anticoagulants (e.g., warfarin): may enhance anticoagulant effect, necessitating INR checks.
  • Cholesterol‑lowering agents (e.g., statins): monitor for additive musculoskeletal complaints.

Frequently Asked Questions

Letrozol Viatris contains letrozole, an aromatase inhibitor indicated for the treatment of hormone receptor‑positive breast cancer in postmenopausal women, including adjuvant, neoadjuvant, and metastatic settings.

Letrozole blocks the aromatase enzyme, preventing the conversion of androgens to estrogen. This lowers circulating estrogen levels, depriving estrogen‑dependent breast cancer cells of a growth stimulus and inhibiting tumor proliferation.

The prescribed dose of Letrozol Viatris is determined by the treating physician based on the patient’s clinical condition, treatment stage, and individual response. Dosage adjustments are made only under medical supervision.

Letrozol Viatris is classified as pregnancy category X. It is contraindicated in pregnant women and should not be used while breastfeeding because it can cause fetal harm and is excreted in breast milk.

To order Letrozol Viatris, 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 necessary import documentation.

Letrozol Viatris, as an aromatase inhibitor, differs from selective estrogen receptor modulators (e.g., tamoxifen) by reducing estrogen production rather than blocking its receptor. This mechanism often provides greater efficacy in postmenopausal patients, though side‑effect profiles and individual patient factors guide therapy choice.

Letrozol Viatris should be stored at ambient temperature, below 25 °C, in its original packaging. Keep the tablets away from moisture, direct sunlight, and excessive heat to maintain product stability.

Letrozol Viatris is taken orally, usually as a tablet swallowed whole with water. The exact timing and frequency are prescribed by the healthcare professional and should be followed exactly as directed.

Serious risks include osteoporosis leading to fractures, venous thromboembolism, and severe liver injury. Patients should be monitored regularly for bone density, signs of clot formation, and liver function abnormalities.

Letrozol Viatris should not be used by pregnant or breastfeeding women, patients with known hypersensitivity to letrozole, or individuals with severe liver impairment without close medical supervision.

Published by

GNH India Pharmaceuticals Limited

Licensed pharmaceutical supplier

Last updated:

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