I get my 7% saline with a prescription for less than half what it costs without. I use the higher strength because I still have MAC but cannot tolerate the antibiotics anymore. With my pulmonologist's blessing I neb once a day with the saline. If I am having an asthma exacerbation I neb first with Levalbuterol then saline. If I am congested or coughing a lot I use saline twice a day. Usually I only neb about 3/4 of the solution.

This has been working for me since last December.
Sue