Catnip can induce a temporary state of euphoria or excitement in cats due to the nepetalactone compound. It's not harmful, and the effects usually last for about 10-15 minutes, followed by a refractory period during which the cat won't respond to catnip. It's more of a playful reaction than an actual "high." Not all cats are affected by catnip. Sensitivity to catnip is inherited, and approximately 50-75% of cats respond to it. Kittens and elderly cats are less likely to show a strong reaction, a