Anastrozole is a medication that blocks the enzyme aromatase, reducing estrogen production in the body.

It is primarily used to treat hormone receptor-positive breast cancer in postmenopausal women and may be used off-label in men to manage high estrogen levels during testosterone therapy.

Uses/Indications: Breast cancer, estrogen excess in men.

Precautions: May cause bone thinning, hot flashes, or joint pain.

Contraindications: Pregnancy, premenopausal women (unless directed by a specialist).