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Overview Lobelia (Lobelia inflata), also called Indian tobacco, has a long history of use as an herbal remedy for respiratory conditions such as asthma, bronchitis, pneumonia, and cough. Historically, Native Americans smoked lobelia as a treatment for asthma. In the 19th century, American physicians prescribed lobelia to induce vomiting in order remove toxins from the body. Because of this, it earned the name "puke weed." Today, lobelia is sometimes suggested to help clear mucus from the respiratory tract, including the throat, lungs, and bronchial tubes. Although few studies have evaluated the safety and effectiveness of lobelia, some herbalists today use lobelia as part of a comprehensive treatment plan for asthma.
Scientists think an active ingredient in the lobelia plant, lobeline, has similar effects to nicotine. For this reason, lobeline was once used as a nicotine substitute in many antismoking products and preparations designed to break the smoking habit. In 1993, the U.S. Food and Drug Administration (FDA) prohibited the sale of smoking products containing lobeline. The FDA reported that such products were not effective in helping people quit or reduce smoking.
Researchers now think that lobeline may actually reduce the effects of nicotine in the body, particularly the release of dopamine. Dopamine is a brain chemical that plays a number of important roles in the brain. It is also involved in drug addiction, so researchers think that lobeline may have some potential in treating addiction. So far, however, there have been no studies to determine whether lobeline is effective.
Lobelia is a potentially toxic herb. It can be safely used in small doses (particularly homeopathic doses), but moderate-to-large doses may cause side effects ranging from dry mouth and nausea to convulsions and even coma (see "Precautions" section). You should use lobelia only under the supervision of your health care provider.
Plant Description Lobelia is an attractive annual or sometimes biennial (reseeding every year or 2) herb that grows to a height of 3 feet. Its upright, hairy stem is angular, branching at the top, usually green with a tinge of violet. The pale green or yellowish leaves have a sharp taste and a slightly irritating odor. The sparse flowers are pale violet blue outside and pale yellow inside.
Parts Used The above-ground portions of the lobelia plant (namely the leaves and seeds) are used for medicinal purposes.
Medicinal Uses and Indications Few studies have examined at the effect of lobelia in either animals or people. It is sometimes suggested (usually in combination with other herbs) for the treatment of the following respiratory problems:
In homeopathy, lobelia is also used alone or with other products for smoking cessation, muscle relaxation, nausea, vomiting, skin infections (bites, bruises, poison ivy, and ringworm), and various respiratory illnesses.