Hi Kelly,
I am using Hypertonic Saline (5%) and my fev1 is very low. The highest it's been this last year is 20% and i've had one with 16%. I don't have any side effects, that i know of <img src="i/expressions/face-icon-small-wink.gif" border="0"> I really helps me clear my lungs, i can get the mucous out much better after my HS nebs.
Marjolein