Letrozole is used in women undergoing HRT to promote ovulation, treat infertility, prevent endometriosis and treat breast cancer. Although it is mostly used in females, men with gynecomastia can benefit from HRT with letrozole.
Letrozole is used mainly in women post menopause. If you have recently gone through menopause, discuss birth control with your doctor. Do not use birth control containing estrogen. It is unknown if this drug passes into breast milk. If you experience any of these side effects, contact your medical provider immediately.