[megous]

Then you can carry it on your body while being on a plane. Would that be worth the inconvenience to you?

[Mirioron]

An inhaler and other medication along with your wallet, phone, and passport would pretty much completely fill your pockets. Also, better hope that nobody pickpockets you because you can't get refills for certain medication.

[megous]

So perhaps you can carry it only on takeoff and before landing, when there's a higher chance of survival/emergency evacuation anyway.