Albuterol and breathing treatment

My son had croup and bronchitis, he was prescribed the albuterol 1 full vile 3 times a day for the 1st 3 days then 2 viles for 2 days each day then on the last day just 1 vile. I was advised by the pharmacist that it might make by 5 month old a little shaky. NOT THE DOCTOR which i think she should have told me something about the side affects of a 5 month old. I had never heard of this stuff or what it was for all i knew is it was a breathing treatment. I finished giving my baby the 6 days of albuterol and now that today is the last day he took it I cant seem to calm him in any way, he cant go to sleep, all he does is cry, he wont eat, he's always irritated, restless and IF i can get him to nap, its about 10-20 mins. its AWFUL to see my baby act like this, sometimes when i gave him the treatment and i was holding him i would end up inhaling the albuterol since he was sitting right in front of me i would feel hot flashed ( mind you i would inhale VERY little) i would also feel dizziness hours after inhaling it. however i never noticed it and never paid attention to it. not till today that i noticed my childs behavior did i decide to investigate this stuff. I will NEVER give this to my baby again. I should have been advised about all this however i was not. also my fault as a mother i should have investigated it before i gave it to my child as i trusted the doctor. =(