Sure, catnip is an all natural product that contains no harmful ingredients. Pick out a good quality catnip or catnip toy (hold it up to your nose you should be able to smell it) and introduce it to you cat. Observe your cat and if you feel they get a little too excited for your liking simply stop using it. Catnip is not addictive and will cause and long term affects. I should note that some cats have little or no reaction to catnip but don’t be disappointed just find something else you cat likes.