This is something that has been discussed a lot in asthma communities, as you can see here. Yet there has been very little documented evidence as to whether it is true or not.
Someone asked me this question here, and my answer was a quick, "Studies have shown that if you rinse your mouth out really well after using your Advair inhaler systemic side effects are very rare."
A Second Look
Yet considering the broad discussions on this topic, I'm now wondering if I was wrong. Is it possible that...