allergic rhinitis
"My eyes had been bothering me so much, they are constantly red and irritated, gritty feeling no matter what I do from the moment I wake up until I go to bed. I decided to try Zyrtec because my eyes were so bothersome, and antihistamine eyedrops didn't work. I've been taking it for 2 weeks, and I have never seen my eyes so white and feeling so good. I don't have to use eyedrops at all now. However there is one downside: Zyrtec makes me feel exhausted. It's not like when you take Benedryl and you feel like you could fall asleep standing up, it's more of a foggy feeling and you just feel like you could go for a nap, but the feeling never goes away even if you do nap."