xoponex can be used in inhaler form or through a nebulizer. it is a rescue type medication that opens up the airways during asthma flairups or attacks.
advair or symbicort is a medication you take everyday to control your asthma long term. it is not effective for immediate relief of an asthma attack.

it sounds to me like you need a rescue type inhaler for when you are constricted.

the advair is meant to be taken everyday regardless of wether you feel good or not that day.