Seems like sensible advice to me. You can damage you lungs in this way.
Blue inhaler is worse for your heart. It’s better for you to use the brown inhaler every day in order to avoid occasional use of blue inhaler.
This is the message I got.
While you have bronchitis it seems sensible to use the brown inhaler, but remember this takes days/ weeks of using every day to actually get up to full strength.
When your fully better you can get off it and see what the difference is like as to if you want to keep using the brown. My vote is this is better than reacting each time with the blue.
If your interested use a ‘peak flow’ meter to measure how your lungs are doing (prescription or £10 on web).
Also when using the brown inhaler I also recommend using a ‘spacer’ (mine is called an aero chamber), I did not do this for years but now do and it’s much better with it. Easier on the throat and gets more medication in to your lungs. Again on ‘script or £10 online.