I think Claritin is useless. It is a rotten, poor antihistamine, and some people get elevated liver functions from it.

We have switched to Zyrtec in this house. If Zyrtec makes you feel "funny" try breaking them in half. 5mg twice a day still works for us with no drowsiness.

Zyrtec is related to RX Atarax, which is the most potent antihistamine there is. So I tend to prefer the Zyrtec.

That horrible sore throat I had in early March? Well, Zyrtec took the swelling down, so I could swallow. Benadryl did nothing.

My husband has switched now to Zyrtec too, and he loves it.
We take it at night, so by morning there is no drowsy weird effects and it works all day. Don't need to break them in half anymore!

Claritin did not do well in studies when it first came out. There were many that were comparable to placebo. It is an example of a drug highly promoted and manipulated by sales, to convince people that it works. I don't think it does diddly.

I used to use Allegra, but our insurance stopped paying for it.
So the Zyrtec has been the most effective for us. We have alot of spring allergies here.