## Question
SUBJECT: Letrozole
MESSAGE: Since taking Letrozole the last 4.6 months, I now have a 4 cm. csyst in front of my right ovary that must be removed.  Why am I prescribed a drug that is also prescribed for young women trying to conceive.  I am post menopausal and had early stage breast cancer in 2010.  Now, that I am ending my 5 year run with this drug, I have adverse affects with a cysts.  Is a cysts an egg that was not fertilized from the Follupian Tubes.  I cannot understand this logic of giving me this drug?

## Expert Summary
What are the uses and side effects of letrozole in postmenopausal women?