You should not use letrozole if you are pregnant.
Before taking this medicine
You should not use letrozole if you are allergic to it.
 letrozole is for use only in women who can no longer get pregnant. Letrozole can harm an unborn baby. Do not use if you are pregnant. Use effective birth control if you are not past menopause. Keep using birth control for at least 3 weeks after your last dose of letrozole. Tell your doctor if you think you may be pregnant.
Tell your doctor if you have ever had:
liver disease (especially cirrhosis);
osteoporosis, osteopenia (low bone mineral density);
high cholesterol; or
if you also take tamoxifen.
You should not breastfeed while you are using letrozole and for at least 3 weeks after your last dose.
How should I take letrozole?
Follow all directions on your prescription label and read all medication guides or instruction sheets. Use the medicine exactly as directed.
You may take letrozole with or without food.
You will need frequent medical tests, and your bone mineral density may also need to be checked.
Store at room temperature away from moisture and heat.
What happens if I miss a dose?
Take the medicine as soon as you can, but skip the missed dose if it is almost time for your next dose. Do not take two doses at one time.
What happens if I overdose?
Seek emergency medical attention or call the Poison Help line at 1-800-222-1222.
