On ours, the back of the aerokat is open, so removing the inhaler would let the drugs out. Yours looks like it might have some kind of restrictive flap though.
The steroids were the initial attempt to control his asthma. It worked pretty well for a while (a year, maybe more), but a few weeks ago he went into respiratory distress so we rushed him to the animal hospital. So now it’s steroids plus inhaler! He’s been doing a lot better under the current regimen.