I take levocetrizine all year round, as I have all sorts of allergies. I take them as soon as I wake up, along with my other meds. In the description it says to be careful with alcohol, but it doesn't way why. I know AS advices not to have alcohol while on cetrizine, but since I'm taking it all year round and hardly ever drink, I was wondering if it is really that harmful if I have a drink every now and then? Tonight we have a bbq and I would like to have some smirnoff. Is it a big no no or can I have some once a week or even less?