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Letrozole and checking estrogen levels

Breast Cancer | Last Active: Feb 10 11:03am | Replies (70)

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@ruth7

Just wondering about your blood draw. If you did not have the blood test prior to starting AI. How do you know that it's working? I haven't even begun AI and my estrogen tested <18. I've been menopausal for about 10 years. So it's way below <30 menopause parameter.
My point is you could have started with <15 or it could have dropped. It's a guess but I would presume it's working. If it drops further to <12 or <10, then you will know for sure. The annoying thing is the docs never clarify, what level they want it to get to to, considering all the consequences of extremely low estrogen. The imbalance between estrogen and progesterone over time appaently also causes a lot of mood changes, and is hard on the family members as well.

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Replies to "Just wondering about your blood draw. If you did not have the blood test prior to..."

I’m not at all happy that I wasn’t tested before ( although I had requested it). Since We count on this AI to be effective we should be able to measure its effectiveness!

<15 could be the lowest the lab can get to and yes I have asked the oncologist to check in with the hospital lab but she seemed completely unconcerned with the number and did the test because I insisted… wish I had in the beginning ( when my head was swimming).