I started tinnitus when I added an AI to Herceptin. Originally, it was Femara, but the ringing got so bad, my onc switched me to Arimidex. It has improved, but is still there. I did some research and found that there are estrogen receptors on the cells in the inner ear; I believe my tinnitus is related to low estrogen. I think Femara is supposed to get the levels a little lower than Arimidex. The change in drug made the difference for me between something that was driving me nuts every waking minute to a side effect that I am not always conscious of unless I focus on it.
Hopeful
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