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← Breast Cancer

HEALTH PROFESSIONAL · SOURCE READING

Aromatase inhibitors

Source: Breast Cancer Treatment (PDQ®)–Health Professional Version, National Cancer Institute.

Source updated: April 25, 2025 · Captured 2026-09-09.

Selected source text with whitespace normalised. This Triangle page is not an NCI PDQ summary.

Context: Systemic Therapy for Stages I, II, and III Breast Cancer / Stages I, II, and III HER2-Negative Hormone Receptor–Positive Breast Cancer

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Premenopausal women →Postmenopausal women →Sequential tamoxifen and AI versus 5 years of tamoxifen →Sequential tamoxifen and AI for 5 years versus an AI for 5 years →One AI versus another for 5 years →Switching to an AI after 5 years of tamoxifen →Duration of AI therapy →

Preserved source evidence · Not medical advice