My girlfriend has overcome asthma after learning about TMS through me. She uses her inhaler only on very rare occasions when she's very stressed and understands it's due to TMS.
I cured mine through running but only breathing through my nose. I could do 10km in 37 minutes (just breathing through my nose). I realised you don't need that much air to live/excercise.
I don't even know where my inhaler is anymore. It's around somewhere.
I moved on to more scarier TMS after that. Maybe it's sometimes good to have a small TMS crutch.