I used to smoke for many years and with this I have found myself constantly getting what my doctor calls chronic bronchitis. Every time that I get sick it turns into bronchitis and then it lasts for weeks on end and makes it so incredibly hard to breath. My lungs have such a hard time opening up and I end up coughing a lot and having to fight to get air into them. This medicine is in an inhaler and you use it like you would any other, you breath it in through your mouth and hold it into your lungs for as long as you can and let it do its magic. This works really well when you have bronchitis, it helps to open up all the tubes in your lungs and clear it out so that you are able to breath easier. After using this you are able to instantly take a deep breath and you are not having horrible coughing spells anymore. This is the most effective thing that I have found to help me be able to feel better and breath when I have bronchitis.