I guess there's a lot of difference of opinion on this? My son (20 months) has asthma, so far, only induced by respiratory viruses. He's had two episodes so far. After the second one, his pediatrician wanted him on daily Flovent, but an asthma specialist we saw disagreed and said he should only take it at the onset of of a cold or coughing. It's all so confusing, and I find the disagreements very upsetting when we're talking about things like my son's quality of life.