m in Canada, and here it is not an OTC, one can buy it just of the shelf, Reactine comes regular and non-drowsy which is what I buy, I take the extra strenght one, the main ingredient in it is
Cetirizine Hydrochloride 10mg/tablet, not many antihistamines work for me as they make me feel quite sick and even more dizzy but this one has worked for quite a while now so I haven't had to change it, another one I've tried that worked but didn't buy it regularly as it is more expensive is Ae