Steroids reduce the activity of immune cells in the airways making lungs more susceptible to disease. They also affect the production and function of mucus in airways. I think because of these things it makes it more difficult to fight off infections such as MAC/NTM etc. Some of us have asthma and have little choice when it comes to inhaling corticosteroids for inflammation.

This is what the internet says about low, medium and high levels of steroid inhalers:
1. Low Dose:
* Beclometasone: Up to 200-400 micrograms per day.
* Budesonide: Up to 400-800 micrograms per day.
* Fluticasone: Up to 200-500 micrograms per day.
* Mometasone: Up to 200-400 micrograms per day.
2. Medium Dose:
* Beclometasone: 400-800 micrograms per day.
* Budesonide: 800-1600 micrograms per day.
* Fluticasone: 500-1000 micrograms per day.
* Mometasone: 400-800 micrograms per day.
3. High Dose:
* Beclometasone: More than 800 micrograms per day.
* Budesonide: More than 1600 micrograms per day.
* Fluticasone: More than 1000 micrograms per day.
* Mometasone: More than 800 micrograms per day.