From working in an asthma service, one of the issues is that if salbutamol is taken too often then it starts losing its effectiveness, which is dangerous. So it’s not so much that it should be rationed, but if you’re rinsing a blue inhaler every month then your preventative regime should be reviewed. Or you might need support in taking your preventative regime as it should be.
Epona did they ever try him on a Symbicort smart regime?