Comment by maccard
The short of it was that they decided salbutamol was overprescribed and shouldn’t be given to anyone who isn’t taking a corticosteroid inhaler at the same time. The advice has changed from “if you feel like you need your blue inhaler take it” to “your asthma should be managed by your corticosteroid dose, and if it’s not you should adjust”. Obviously not suitable for everyone but for people like my dad it got him from using his reliever once a week to not having an active prescription for it anymore.
That was a worldwide change after they figured out long acting beta agonists were basically killing people because they don’t treat the underlying inflammation like inhaled corticosteroids do.