Letrozole (femara)

[Wisconsinmom]

Hi,

I'm curious to know if letrozole (femara) is OK to take while breastfeeding? If not, are there any safe alternatives?

Thanks in advance.

[admin]

Wisconsinmom,

Femara is rated an L5-no data-hazardous. "No data are available on its transfer to human milk but I would suspect the levels are low. However, this product works irreversibly and any present in milk could potentially suppress estrogen levels in a breastfed infant. The transfer of small amounts of this agent to an infant could seriously impair bone growth or sexual development of an infant and for this reason it is probably somewhat hazardous to use in a breastfeeding mother.It has a very long half-life which is concerning in a breastfed infant and could lead to higher plasma levels over time. It is not advisable to breastfeed an infant while consuming this product. Discontinue breastfeeding while taking this product or for a period of ten days following its discontinuation." (Medications and Mothers' Milk, Dr Thomas Hale database) Please speak with your Dr about alternative medications.


Sandra Lovato R.N.
InfantRisk Center
806-352-2519