Do not take this medication with any of the following:
-Estrogen and progestin hormones
This medication may also interact with the following:
-Dietary supplements, such as androstenedione or DHEA
-Prasterone
-Tamoxifen

They need to know if you have any of these conditions:
-High cholesterol
-Liver disease
-Osteoporosis, weak bones
-An unusual or allergic reaction to letrozole, other medications, foods, dyes, or preservatives
-Pregnant or trying to get pregnant
-Breastfeeding

Tell your care team if your symptoms do not start to get better or if they get worse.
Do not become pregnant while taking this medication or for 3 weeks after stopping it. Women should inform their care team if they wish to become pregnant or think they might be pregnant. There is a potential for serious side effects to an unborn child. Talk to your care team or pharmacist for more information. Do not breast-feed while taking this medication or for 3 weeks after stopping it.
This medication may interfere with the ability to have a child. Talk with your care team if you are concerned about your fertility.
Using this medication for a long time may increase your risk of low bone mass. Talk to your care team about bone health.
You may get drowsy or dizzy. Do not drive, use machinery, or do anything that needs mental alertness until you know how this medication affects you. Do not stand or sit up quickly, especially if you are an older patient. This reduces the risk of dizzy or fainting spells.
You may need blood work done while you are taking this medication.

Keep out of the reach of children.
Store between 15 and 30 degrees C (59 and 86 degrees F). Throw away any unused medication after the expiration date.