Elecampane is used for lung diseases including asthma, bronchitis, and whooping cough. It is also used to prevent coughing, especially coughing caused by tuberculosis; and as an expectorant to help loosen phlegm, so it can be coughed up more easily.
There’s a chance elecampane can interfere with blood pressure and blood sugar levels. So folks who have diabetes or hypertension may want to steer clear.