I just wanted to say that I hope all is better, and you can get him back on track.
My son has asthma as well, but he can go weeks and even months with no problem, then have days where he's needing the nebulizer every 3 hours.
He tried Advair once, when he'd been having a rough time. At least I'm pretty sure that is what it was. He got a mouth full of sores, really bad, even after following the directions. It was awful - the nebulizer was best.
It's hard having a child with such a serious disease, so I just wanted to offer you some support.
We've only had a few bad times with my son, but travelling has been stressful on him. Our
Disney cruise had him in the clinic for treatments, and on steroids, and antibiotics (I let the wheezing get too bad with just the inhalers and after a couple of days, his lungs got infected and he had a high fever). I felt so bad for him, laying in the cabin watching Disney movies, but he didn't complain once. He even got into the sunshine for a couple of hours at
Castaway Cay and walked around, before I took him back to the ship to rest and get another treatment.
I learned my lesson - just bought a portable nebulizer and we won't go anywhere without it now.
Here's hoping for a happy and healthy new year!