It is still used to treat coughs, asthma and bronchitis. Uncontrolled studies suggest lobeline may improve lung function. No more than one milliliter of lobelia tincture or extract should be taken at a time. Taking too much internally may cause nausea and possibly vomiting. The most popular form of lobelia is an ointment, which is used topically on the chest to relieve asthma and bronchitis.
Some specialty stores sell lobelia acetracts, which are made using vinegar instead of alcohol.
Using too much lobelia can frequently cause nausea and vomiting. Other signs of lobelia poisoning may include weakness, heartburn, a weak pulse, and difficulty breathing. Lobelia should not be used by pregnant or lactating women, or by children less than six years old. Lobeline and reduction of cigarette smoking. Ellingwood F. American Materia Medica, Therapeutics and Pharmacognosy , 11th ed.