Lobelia is an herb that people once used to stimulate breathing. The main active compound, lobeline, has mild bronchodilator effects. People take it as a liquid extract or tincture from the dried herb, usually for short periods only.
Lobelia carries serious safety risks. It can change heart rate and blood pressure. It can also cause nervous system side effects like seizures. Do not use it without professional guidance.
This herb interacts with central nervous system depressants like alcohol and sedatives. It also interacts with stimulants and some heart medications.