Does seem a little strange, it sounds like someone, somewhere has had a bad experience with ceterizine.
Loratadines been around a little longer, so (???) may have a better established, and safer profile.
Both are meant to be "non drowsy", but experience tells us otherwise.
It's a bit off the point, but have you tried the topical/inhaled stuff. They tend to work well for someone with your symptoms, aklthough you have to persist with the treatment.