GNH USA

Europe — EMA

Letrozole

GNH USA supplies Letrozole, a aromatase inhibitor for hormone‑receptor positive breast cancer in postmenopausal women. Request a quote for global supply.

Letrozole

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1
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What is Letrozole?

Letrozole, the active ingredient in Letrozole, is an aromatase inhibitor presented as a tablet for oral use. It treats hormone receptor‑positive breast cancer in postmenopausal women by lowering estrogen levels. GNH USA supplies Letrozole as a licensed, GDP‑compliant international pharmaceutical supplier serving oncology centres worldwide.

What is Letrozole used for?

Letrozole acts on estrogen‑dependent pathways, primarily in breast cancer management. - Hormone receptor‑positive breast cancer in postmenopausal women: reduces estrogen production to inhibit tumor growth. - Metastatic hormone‑receptor positive breast cancer: helps control disease progression in advanced stages. - Adjunct therapy for ovulation induction (off‑label): lowers estrogen feedback to facilitate gonadotropin release.

What are the side effects of Letrozole?

Letrozole may cause a range of adverse reactions.

Common Side Effects: - Hot flashes - Joint and muscle pain - Fatigue - Nausea - Headache - Dizziness

Serious or Rare Side Effects: - Severe liver injury - Osteoporotic fractures - Deep vein thrombosis or pulmonary embolism - Cardiac arrhythmias - Anaphylactic or severe allergic reactions - Hypercholesterolemia

What precautions apply to Letrozole?

When prescribing Letrozole, clinicians should consider several safety measures. - Monitor bone health: assess osteoporosis risk and consider calcium/vitamin D supplementation. - Assess liver function: periodic liver enzyme testing is recommended. - Evaluate cardiovascular status: review history of thromboembolic events. - Contraindicated in pregnancy: teratogenic risk mandates strict avoidance. - Use only in postmenopausal women: not indicated for premenopausal patients. - Store at ambient temperature: keep below 25°C, protect from moisture in the original packaging.

What does Letrozole interact with?

Letrozole can interact with several drug classes, requiring careful management.

Major Interactions (Avoid): - Estrogen replacement therapy: may counteract Letrozole’s efficacy. - Strong CYP2C19 inhibitors (e.g., fluconazole): increase plasma concentrations. - Strong CYP3A4 inducers (e.g., rifampicin): reduce drug exposure.

Moderate Interactions (Monitor Closely): - Warfarin: may enhance anticoagulant effect; monitor INR. - Anticonvulsants (e.g., carbamazepine): may lower Letrozole levels, requiring efficacy monitoring.

Frequently asked questions

What is Letrozole used for?+
Letrozole is prescribed primarily for hormone‑receptor positive breast cancer in postmenopausal women. It is used in both early‑stage adjuvant settings and in metastatic disease to reduce estrogen‑driven tumor growth. Occasionally, it is employed off‑label to aid ovulation induction by lowering estrogen feedback.
How does Letrozole work?+
Letrozole works by selectively and reversibly inhibiting the aromatase enzyme, which converts adrenal and ovarian androgens into estrogens. This inhibition leads to a marked reduction in circulating estrogen levels, depriving estrogen‑dependent cancer cells of a key growth signal.
What is the usual dose of Letrozole?+
The dosage of Letrozole is determined by the prescribing clinician based on the patient’s condition, disease stage, and treatment protocol. Typical regimens involve a once‑daily oral tablet, but the exact strength and schedule are set by the healthcare provider.
Is Letrozole safe in pregnancy or breastfeeding?+
Letrozole is classified as Pregnancy Category X, indicating it is contraindicated during pregnancy due to known teratogenic risk. It is also not recommended for breastfeeding women because it may pass into milk and affect the infant.
How do I order Letrozole from GNH USA?+
To order Letrozole, submit an enquiry on the product page at gnh-usa.com, specifying the required quantity. GNH USA works with hospitals, pharmacies, and procurement teams worldwide, verifies trade or institutional credentials, and then provides pricing, availability, shipping details (including any required cold‑chain handling), and import documentation.
How does Letrozole compare with other aromatase inhibitors?+
Letrozole, anastrozole, and exemestane belong to the same class of aromatase inhibitors. Letrozole is often chosen for its potent and sustained estrogen suppression, while anastrozole has a similar efficacy profile with a slightly different side‑effect spectrum. Exemestane is a steroidal inhibitor and may be preferred in patients who have progressed on non‑steroidal agents.
How should Letrozole be stored and handled?+
Letrozole tablets should be stored at ambient temperature, below 25 °C, in their original blister or container to protect from moisture and light. Keep the product out of reach of children and avoid storing in bathrooms or other humid environments.
How is Letrozole administered?+
Letrozole is taken orally as a tablet, usually with a glass of water. It can be taken with or without food, but consistency in administration (same conditions each day) helps maintain stable drug levels.
What are the most serious risks associated with Letrozole?+
Serious risks include severe liver injury, osteoporotic fractures, deep‑vein thrombosis or pulmonary embolism, and rare but life‑threatening allergic reactions. Patients should be monitored for signs of hepatic dysfunction, bone density loss, and any sudden cardiovascular symptoms.
Who should not use Letrozole?+
Letrozole is contraindicated in premenopausal women, pregnant or breastfeeding individuals, and patients with known hypersensitivity to the drug. It should also be avoided in patients with uncontrolled liver disease or a history of severe thromboembolic events unless the benefits outweigh the risks.
Information provided on this page is for educational use by procurement and clinical professionals. Always consult a licensed healthcare provider for medical advice and prescribing decisions. GNH USA supplies this product subject to applicable regulatory and licensing requirements.
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Product details

Drug
Letrozole
Route
Oral Use
Manufacturer
Krka, D.D., Novo Mesto
Origin
EU

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