💊 Letrozole (Hormonal Chemotherapy)

Letrozole is a potent nonsteroidal aromatase inhibitor. In postmenopausal women, the body produces estrogen primarily by converting other hormones (androgens) into estrogen via the aromatase enzyme. Letrozole blocks this process, depriving estrogen-dependent breast cancer cells of the "fuel" they need to grow.

📋 Indications

• Early Breast Cancer: Used after surgery for postmenopausal women with hormone-receptor-positive cancer.
• Extended Therapy: For women who have already completed 5 years of Tamoxifen therapy.
• Advanced/Metastatic Cancer: First-line treatment for hormone-dependent breast cancer that has spread.
• Pre-operative Use: To shrink localized tumors before breast-conserving surgery.

🥄 Dosage & Administration

• Standard Dose:2.5 mg once daily.
• Duration: * For early breast cancer: Usually continued for 5 years or until the tumor returns.
  • For metastatic disease: Continued as long as the treatment is effective.
• Timing: Can be taken with or without food.
• Hepatic/Renal Impairment: Generally no adjustment is needed for mild to moderate cases, but severe liver impairment (Child-Pugh C) requires close medical supervision.

⚠️ Contraindications

• 🛑 Pregnancy & Lactation: Strictly prohibited. It can cause fetal harm and malformations.
• 🛑 Pre-menopausal Status: Only indicated for women who have naturally or artificially reached menopause.
• 🛑 Severe Liver Dysfunction: Use is contraindicated in cases of severe hepatic failure.

⚠️ Side Effects

• Very Common: Hot flushes, increased cholesterol, joint and bone pain (arthralgia), and fatigue.
• Bone Health: Long-term use can lead to thinning of bones (osteoporosis), increasing the risk of fractures.
• General: Nausea, headache, dizziness, increased sweating, and weight gain.
• Rare/Serious: Blurred vision, anxiety, or yellowing of the skin/eyes (jaundice).

🛡️ Precautions

• Driving/Machinery: Because Letrozole can cause fatigue and dizziness, exercise caution when driving or operating heavy machinery until you know how the drug affects you.
• Bone Monitoring: Doctors often monitor bone mineral density during treatment due to the risk of osteoporosis.

📦 Storage

• Store below 30°C in a dry place.
• Protect from light and moisture.
• Keep out of reach of children. 🚫👶