well...i've been taking Zyrtec last season with no problems, this season its not working. I looked on the prescription bottle and the damn things expire today. So i'm hoping that with nearing their expiration date that their effectivity was going down. I'm getting a refill today - hopefully to put an end to my everyday suffering from the time i wake to the time i pop 2 benedryl's to go to sleep (recommended for those who cant sleep because of allergies - it knocks you right out once it starts to go through your system)