I used to get bronchitis 2X year, spring and winter. Now I have to be very careful because every time I get a cold it turns into bronchitis. The only antibiotic that works for me is Floxin 400 mg 2X day for 10 days. The doctors always look at me funny when I ask for it because I guess it's a little older than some of the stuff out there and they always want to give me the newest stuff, but this is the only thing that works for me.
It's for bronchitis and pneumonia, so I guess its pretty strong stuff