@vg1950. We are all different, so your concerns are definitely valid. I personally have not had any bad side effects. When I first started, my voice was raspy but that went away within a couple of weeks. The trainer told me to always use the Albuterol inhaler 15 minutes prior to treatment to open airways and prevent a bronchospasm. Are you seeing an infectious disease doctor along with a pulmonologist? How familiar is your doctor(s) with MAC?