bronchitis is not contagious (you cannot transmit bronchitis to someone else) but the pathogens (viruses bacteria fungus) etc. that are capable of causing bronchitis can be transmitted to others but exposure to these pathogens does not mean that the exposed person will contract bronchitis. they may only get a simple cold. or nothing at all. you are on an antibiotic that may or may not help bronchitis since it is just a clinical guess that the cause is bacterial.
i take sulfamethoxazole-tmp for bronchitis does that mean it can be contagious?