Quick Scoop

Catnip is a mint-family herb called Nepeta cataria that contains an oil called nepetalactone, which can trigger a short-lived reaction in many cats. Most cats that respond will sniff, rub, roll, purr, get playful, or seem briefly extra relaxed or hyper, and the effect usually fades after about 10 to 15 minutes.

What it is

Catnip is a common plant that grows in many places and is known for its strong scent. The scent, not the plant itself as a food, is usually what causes the biggest reaction in cats.

What it does

When a cat smells catnip, nepetalactone interacts with receptors in the nose and can spark behavior changes linked to excitement and play. Cats may roll around, rub their faces on it, meow more, become zoomy, or sometimes act calm and dreamy instead. If they eat it, the effect is often milder and may be more calming.

Who reacts

Not every cat responds to catnip, and the reaction is partly genetic. Kittens usually do not react until they are around 6 months old or older.

Safety

Catnip is generally considered safe for cats and is not addictive. In large amounts, it can cause mild stomach upset such as vomiting or diarrhea, so moderation is best.

Simple example

A typical catnip session might look like this: your cat sniffs a toy, rolls on the floor, purrs, bats at the toy, then loses interest after a few minutes and rests.

TL;DR

Catnip is a safe herb that makes many cats temporarily excited, playful, or relaxed, but not all cats respond to it.