* Extracts of the Pelargonium sidoides plant (such as umckaloabo) have long been used in traditional South African medicine to treat respiratory tract infections. In a 2007 study of 217 people with acute bronchitis, researchers found that an herbal drug preparation from the roots of Pelargonium sidoides helped lessen cough, chest pain, and production of mucus.
* botanicals like [[astragalus]] and [[echinacea]] may boost your immune defense against bronchitis-causing viruses.
* Andrographis may help to prevent upper respiratory tract infections if taken during the winter months on a daily basis, according to clinical evidence.
== Warnings ==