Bronchitis is a type of infection that affects your lungs. It causes inflammation in the lining of your bronchial tubes - these are the tubes that carry air from your trachea (windpipe) into your lungs. Bronchitis is most often caused by viruses, usually the same ones that cause a cold or the flu, although sometimes bacteria are to blame. Below you may find medications used to treat or help with Bronchitis. More about Bronchitis