The answer may surprise you. While cat urine isn’t the most pleasant smell in the world, it generally won’t do you any harm if you happen to inhale a little bit of it. In fact, cat urine is actually fairly sterile and doesn’t contain many of the harmful bacteria that are found in other types of animal urine.
So while you probably don’t want to go out of your way to take a big whiff of cat urine, there’s no need to worry if you accidentally inhale a bit of it. Just open up some windows and air out the room as soon as possible!