From the Manufacturer:
Lobelia (Lobelia inflata), also called Indian tobacco, has a long history of use as an herbal remedy for respiratory ailments such as asthma, bronchitis, pneumonia, and cough. Native Americans historically 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 considered an effective expectorant, meaning that it helps clear mucus from the respiratory tract. Although few studies have thoroughly evaluated the safety and effectiveness of lobelia, some herbalists today incorporate lobelia into a comprehensive treatment plan for asthma.