Lung/Bronchial Tincture Questions

Lung/Bronchial Tincture: the directions say to take 1-2 droppers full 2-4 times daily.

Questions:

Do you take it straight or mix it with water?

Do you take it on an empty stomach or does it not matter. If you do take it on an empty stomach, how long must you wait before eating?

Do you mix the 5 drops of Lobelia tincture right in with the Lung/bronchial Tincture or take it separately?

Thanks