My 4 y/o son has very bad asthma/allergies it's been 3mos ago tha...

My 4 y/o son has very bad asthma/allergies it's been 3mos ago that his Dr. put him on Singulair and he has had no asthma or allergies !!! I was so relieved since he's already been hospitalized 3x for the asthma prior to the meds. The behavior thing is not an issue at home but it is a big issue in public, he starts bouncing off the walls, and is non stop, I don't like taking him anywhere because he gets so wound up,he just starts running from my husband and me, he screams and hides from us. He's in daycare during the day but his teachers say he is a good boy for them. he used to get high strung when he was taking the albuterol / asthmacort (steriods) thru the nebuilzer. So maybe it's just a age thing? I'm not going to just assume it though, I'm going to call the Doctor tomorrow and see what he thinks......