Is it possible to give a cat too much catnip?

Yes, it is possible to give a cat too much catnip.

If a cat is exposed to too much catnip, they may experience an upset stomach [1], vomiting, and hyperactivity.

Additionally, catnip can lose its effect with too much use [2], so it's important to monitor how much catnip your cat is consuming and to keep it to a moderate level.

It's important to keep in mind that cats can become addicted to catnip and may display signs of withdrawal if they do not receive it regularly.

Additionally, cats may also become desensitized to catnip after long-term use, so it is important to rotate the type of catnip and the frequency of use to ensure your cat is still having a positive experience.