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Ian E. Smith, MD, FRCP, FRCPE

Articles by Ian E. Smith, MD, FRCP, FRCPE

Letrozole (Femara) is a nonsteroidal aromatase inhibitor that is approximately 10,000 times as potent as aminoglutethimide in vivo. Two pivotal multinational phase III trials have compared letrozole (0.5 and 2.5 mg/d) against megestrol acetate and aminoglutethimide, respectively, in patients with locally advanced or metastatic breast cancer.

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