As a side note, in one of Richard Schulze vids, he mentions a time in his association with JR Christopher. He was working the heath fair circuit where Christopher sold his cough formula containing some lobelia and people asked for their money back since it MADE them cough. JR said that is what the formula was supposed to do… cough stuff up. You want that nasty stuff out.
On the other hand, I was once on an ace-inhibitor which caused me to develop a cough. I found that a few drops would stop it. Maybe the herb knows what is best for the condition?