Cats inhale the aromatic oils of catnip and valerian root, where they come into contact with special receptors in the cats nose. These receptors are linked to the brain and affect the cats behavior.The effect may vary from cats, but it often makes our furry friends calm and happy. The allure of plant extracts in Catnip Spray stimulates the instincts of playing games in most cats, providing a burst of playful energy, usually followed by a mellow period.