I have tried all 3 aromatase inhibitors, just under 1 year, changing due to severe headaches.
Anastrozle, Letrozole and now Exemestane. As soon as I started Anastrozole I developed a cough.
I have it during the night and when I first get out of bed in the AM. My cough actually sounds like bronchitis but I don't have it during the day. I have reported this to numerous doctors...everyone listens to my lungs and makes no comment, so I am "assuming" my lungs are clear.
There is no question in my mind it is due to the AIs. These drugs have an unending list of possible side effects.
It seems those of us who are posting here are reporting many different side effects...take your pick.
And, for me, complaining to my breast oncologist is always the side effect that gives me the most pain, and affecting my quality of life which are severe, persistent headaches. For you it's the severe, persistent coughing. If it's not one thing...it's another. But for lots of women taking the AIs it is like taking a MVI daily. Bless them! So fortunate to tolerate the AIs so easily. What to do? We are between a rock and a hard place. We simply plow through it all or some of us just give up on the AIs. And hope for the best.
Wishing the very best for everyone in their personal situations. It can be beyond difficult.