i've been taking claritin everyday for the past 10 years. last year i decided to try zyrtec, and my 370 pill bottle was just finished.
i went back to claritin because i had some hanging around.
what i noticed going back to claritin is that my nose has started to run more and it didn't seem to work as well...i didn;t know if it's the meds or that it's the rainy/pollen season.
however,....i didn't remember any difference when i went from clartin to zyrtec
the end.