Mammagrande (Oregon, USA) on 08/17/2019:

I put 2 drops in 3/4 c. water and slugged it down. Within 2 minutes could breathe well! Within 5 minutes can feel it doing something to lungs! Waiting for coughing to stop, quality of cough changing, seems more productive in a less unpleasant way--less dry/painful. Menthol in it. Draining sinuses now. Some people are allergic, be advised.....