NO!! Go to Costco and buy the Costco brand (Alleclear) of generic claritin - <$12.00 for 300 tabs
It does work but it is sedating - thus the DQ on it.
I have bad allergies and zyrtec is what works the best for me, but it makes me drowsy. My doctor prescribes me Allegra-D, he says it is non-sedating. It doesn't make me drowsy and it works pretty good but not as good as zyrtec. If I take zyrtec I just make sure that I take it before I go to bed, instead of during the day. That might work for you!
The problem with this method is the Zyrtec is a 24 hour preparation and you will not be able to fly the next day.