Hi tui2 and welcome. While you may hear back from other community members regarding their experiences with asthma. mucus and long term antibiotics, I thought you might want to look over this article on asthma medications from the National Lung Association. They have a small section devoted to antibiotics. You may want to take this topic up as well with the physician who treats your condition.
Please check back with us and let us know how you're doing.
All the best,
Leon (site moderator)