I would like to find out if dettol inhalation over a period of time can have negative consequences for a 3 year old, it was sprayed in class room and as method of dicipline on child. my child gets sick often was wondering if it could be the reason.

Unlikely: The main ingredient in this product is benzalconium chloride which is an antibacterial agent. Any person can have an individual sensitivity to a chemical and react with a skin rash or have it trigger respiratory irritation. It is a common agent used to prevent the spread of germs/infection.

Hmmm....: Having classmates or school-aged siblings is the common cause of a child who "gets sick often." Germs are spread through the air and by touch... as we are talking about colds, flus, stomach viruses, etc... Used properly, Dettol sprays are not dangerous and should decrease the number of spreading infections, but the decrease is probably small because kids touch each other and cough on one another.