I'll be honest, I'm not entirely sure how vaporization could either positively or negatively affect your symptoms. How severe is the cystic fibrosis that you currently suffer from? Do you constantly have to deal with fluid buildup in your lungs as some sufferers do, or is it less of a tangible buildup in your lungs? The reason I ask is because vaporization does introduce a great amount of moisture to your lungs, which might be detrimental to your condition.
That being said though, it also may have a positive effect. I know it's probably not what you want to do, but I think you should speak to your specialist, as they'll know most about your specific condition and how this could affect it. As well, if you haven't looked into this already you should look into edible or topical preparations, as they also have very useful medical effects with little in the way of the side effects caused by inhaling.