Allergy Sufferers - Which one would you pick; Zyrtec or Allegra?

Shouldn't matter.  Both act through a similar mechanism.  Zyrtec doesn't cause drowsiness though.

i prefer Claritin. Zyrtec just never seem to work for me, probably because they were samples.

Allegra doesn't cause drowsiness either, at least for me. It's my allergy medicine of choice; I use the 60 mg dose instead of the 180 to give greater variability. I typically find that the 12 hour dose wears off after only 10, so I overlap it a bit.

 

I also agree that this is the worst allergy season I can recall. It's tapering off here, but there's this blasted tree right outside my window that's still blooming.

I used to use claritin, but switched to zyrtec because it seems to keep the allergies more consistently under control with the least side effects.

I'm also a Zyrtec user, it's worked the best for me out of the more popular stuff.

My experience with various antihistamines to treat grass & mold allergies:

Diphenhydramine and dimenhydrinate (Benadryl and Gravol): Most effective at preventing itching. The sedation makes it unsuitable for daily use though IMO, and the added stimulant in Gravol barely mitigates the problem. I mainly use them on days when it's especially bad. The main reason I still keep supplies of them are for their anti-emitic properties, though.

Cetirizine (Zyrtec): I currently take it daily, not quite as effective as Benadryl or Gravol but the lack of sedation makes it better for daily use

Loratadine (Claritin): Used to use it as a kid, I don't recall it being as effective as Zyrtec

Never tried fexofenadine/Allegra, but it's a 2nd-gen H1 antagonist like Zyrtec so I'd assume it's just as effective

 

Also, this can't be used for daily allergies, but since the mosquitos are also out in full force, topical hydrocortisone cream (1% is fine, 2.5 is great) is amazing for bug bites.

I've tried both Zyrtec and Clariin but they both don't work very well with me. Switched to Allegra and it did a much better job although it didn't stop the symptoms completely.

I use Zyrtec now and then. My allergies used to be worse when I was a kid, so I took a number of meds. My father's a pharmacist, so I tried everything.

My issue with Claritin and Allegra is that I eventually developed a tolerance for them. Hasn't happened with Zyrtec, but I only take one every few weeks. Most of the time, I just let allergy attacks pass. Quite fortunately, I also developed tolerance for my cat. Took a few weeks, but I can be around her with no or just mild symptoms. If I get a few symptoms at night, I'll take 25mg of Benadryl. Knocks me out and sometimes provides vivid, weird dreams. They also dry me out, so I drink a pint of two of water along with it.

Yeah I always have crazy dreams with DPH too, I would take it at night more often if it didn't make me so groggy in the morning.

I moved to New Mexico.  It worked.

Sympathies to all those suffering with it right now.  This is the worst year that I can remember in a while.  I always have at least a couple of days a year when it gets bad enough to take time off work (something I very rarely do) but this is the worst in a long time.  Apparantly in the uk tree pollens just about finishing, but now comes the fun stuff with the grass pollen!