allergic rhinitis
"It seemed to me the reviews here were overly negative for Allegra.  For me, Allegra has the fewest side effects. I've never had any drowsiness issues with Allegra.I have noticed that it takes about two hours to get the maximum benefit although starts to work in 20 minutes.  It does lose potency after 7-8 hours.  I sometimes cut the pills in half so can you extend the effect a little longer. It does provide excellent relief.  For extreme pollen levels, I think Zyrtec or Xyzal are a little stronger. But, I would try this because it seems to less side effects if you have not been a regular antihistamine user."