Hi Ambruck and welcome to A2K.
I wonder if behavior problems caused by allergies are more common than reported. Or maybe it's reactions to allergy medications.
My son seems to have terrible reactions to allergy meds. We end up in a terrible cycle of the allergies making him miserable and the meds making him miserable.
Zyrtec seemed to be working but one morning he asked if it could make him have strange dreams. We looked it up and sure enough it can
make people have vivid dreams.
I can't even imagine dealing with a whole school of kids being affected in such a way.