I'm was on 10mg for approximately 90 days. I started because I had some left from a hospital stay. After a few days of trial I felt so good that I just kept it up but my pulmonologist wants me off. So I reduced to 7.5 for 30 days and down to 5mg for 5 days and had to go back to 10mg for 4 days because I was just dragging around and had to nebulize twice as much. Going to to try to reduce to 7.5 again for a while. But I expect after a few days my breathing and endurance will get worse.