To avoid spreading bronchitis, contact with others should be avoided until symptoms wane. In most cases, acute bronchitis is contagious and will remain so until symptoms begin to subside, states MedicineNet.com. Acute bronchitis that is not caused by a virus or bacterium isn't contagious.
Some acute bronchitis is caused by pollutants, tobacco smoke or other environmental agents and is not contagious, explains MedicineNet.com. Bed rest and reducing coughing are the most effective ways to treat acute bronchitis. Antibiotics are typically not needed, but some people use NSAIDs to reduce inflammation. If coughing is a symptom, over-the-counter medications containing guaifenesin and mucolytics may be helpful.