@spider109
Fexofenadine (Allegra) is a good choice for people with bronchiectasis. It does not dry out or thicken mucus the way older antihistamines can, so it shouldn’t interfere with clearing your lungs.

It works on allergy symptoms without affecting the part of the body that controls mucus movement. In fact, it may even slightly help breathing and reduce allergy related inflammation.
Bottom line is that it can help allergies without getting in the way of airway clearance.

You should ask your doctor if you still have concerns.