Dur, I know I should not be fatwa shopping.
Shafi'is say that an inhaler breaks one's fast. Howeva, there' s an alternate opinion that it doesn't.
Logically, it makes sense to me that an inhaler should not break the fast, as it's not aimed for my stomach, but rather for my lungs. This is my first Ramadan as an asthmatic, and although I don't need to use my emergency inhaler too much, I'd rather not have to break my fast 30 minutes before iftar for an asthma attack.
Definitely something to talk with the husband about and get a third zahari opinion.