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Table 5 The different degrees of whole body aromatase inhibition by the various aromatase inhibitors

From: The role of aromatase inhibitors in ameliorating deleterious effects of ovarian stimulation on outcome of infertility treatment

Aromatase inhibitor Dose Mean percentage of total body aromatase inhibition
Aminoglutethimide in conjunction with hydrocortisone 1000 mg plus 40 mg of hydrocortisone (daily) 90.6
Formestane 250 mg (every 2 weeks, intramuscularly) 84.8
Exemestane 25 mg/day 97.9
Fadrozole 2 mg/day 82.4
Anastrozole 1 mg/day 97.3
Letrozole 2.5 mg/day >99.1
Vorozole 1 mg/day 93