Catnip is like a short, harmless burst of excitement for many cats. A cat may roll, rub, purr, zoom around, or get unusually relaxed for about 5 to 15 minutes, and then the effect wears off.

What it feels like

For some cats, catnip seems to trigger playful energy: they may dart around, bat at toys, or act extra goofy. Other cats become dreamy, calm, or mildly spaced out instead of hyper.

Why it happens

Catnip contains a compound that affects a cat’s sensory system, which can change behavior temporarily. The response is inherited, so not every cat reacts, and younger kittens may not show much interest yet.

Safety

Catnip is generally considered safe and non-addictive for cats, and most cats stop on their own when they’ve had enough. If a cat eats a lot of it, mild stomach upset like vomiting or diarrhea can happen.

Simple picture

Think of it like a brief mood swing from “normal cat” to “playful, silly cat,” and then back again. The reaction is temporary and varies a lot by cat.

TL;DR: catnip usually makes cats act playful, roll around, rub, purr, or sometimes chill out, and the effect only lasts a short time.