i have a really heavy cold and for the past two days, have been very wheezy and struggling to breathe at times. I have mild asthma but rarely use an inhaler, although i have one blue and one brown (though i think it might be out of date, its so long since i used that one!). The only thing that is relieving it at the moment is my ventolin inhaler, but how much is safe in a day?
TIA