Yes I'm allergic to cats Claritin is effective for me so was Zyrtec. I had no side effect on either. I'd swap between them to try to avoid any tolerance. I started taking them regularly usually at night because getting up all stuffy sucks or tossing and turning. Then I'd forget and the symptoms would return in a couple of days. After a while I cold go longer between now I don't take anything. The only time its a problem is if I'm stressed or sick. Funny thing other cats bother me still
I had to buy it and leave it at my parents house for their cat. Even scratches from their cat look different than my cat all raised and itchy.
Also washing my hands after some loving is key.
What symptoms do you have? Mine is raised scratches or red eyes, sneezing etc if I rub my eyes. I'm fine with any cat as long as I wash with soap and water after touching. If I'm in someone's house has alot of cats or dust and cigarettes I'm in trouble. So keep the cat out of the bedroom. But on the other hand my cat spends every night in my bed maybe that helped my immunity?
Good luck you might get over it