Sometimes, I use my blue puffer (with a spacer, yet!) a few minutes before I inhale my Symbicort, just so that I don't spend a long time exhaling to make room for the meds.
I don't always need my Symbicort. I go by peak flow and the sensation in my lungs to determine when to start using it.
I have found that when my lungs are tight, it can take a long, long time to exhale enough air to make space for the Symbicort. I try not to huff the air out forcefully because I read somewhere that one's lungs could react to a hard exhalation by tightening up even more. So it is a gentle exhalation.
But sometimes I don't come close to getting the air out before I desperately need to inhale (or, on more than one occasion, before my vision starts to go black).
Is my approach a rather belt-and-suspenders one? Am I wasting time and meds? Should I just exhale 'some' air before inhaling the meds?