I have developed bronchitis (bad enough I could not talk and walk at the same time for lack of air) from the last two colds I had. I now have a whole regimen of doctor prescribed meds trying to head off the next round. I told my hubby that I am going to be absolutely obsessive about the Cold-Eeze and guaifenesin the next time I get that scratchy throat. I have caught every upper respiratory infection that has wandered by me for the last year (since I moved), so I hope I have some immunity now, but if not, I am going to smell like Cold-Eeze for duration of the fall and winter.