I use Clarityn too, and it's also very expensive. But it does work better than the other, cheaper brands I've tried so I'm sticking with it.

I was at the doctor today since I've been having a rougher time than normal with my allergies (and it started earlier this year as well) and it turns out I've developed a cross-reaction to hazel pollen as well >_<

You'd think with all the technology we humans have we'd be able to deal with allergies better than we currently do. But nooooo; we can walk on the moon but not develop a vaccine against allergies