I wasn't allergic to my kittens when i 1st brought them home, but now, 5 months later, i am dying! (currently on 10mg claritin (loratadine).) why?

Please see below.: Sometimes you can get sensitized to an allergen (including, unfortunately, cat dander) over time. If avoidance of an allergen isn't an option, the next step is to see your doctor about additional medications and possibly allergy shots.

It happens: This is not an uncommon scenario. However before you get rid of your cat see your allergist and get skin tested to verify it is the cat that is the problem. If it is the cat why now and not before did you develop symptoms? There are several possibilities: you may have over the past couple of weeks developed the sensitivity or the cat may have started to make sufficient allergen that is now a prob.