Cat mint contains a substance called nepetalactone, which has a hallucinogenic effect on cats. It stimulates the cat's central nervous system and makes cats excited and happy, so cats like mint very much. After cats smell mint or eat it, they will behave differently than usual, such as rolling on the ground in ecstasy, rubbing their heads, etc.

Precautions for using catnip:

1. Dosage. The dosage of catnip should not be too much at one time. Just use a little amount that is about the size of your thumb nail at a time.

2. Number of times. Do not let cats come into contact with catnip for a long time. If used too frequently, it will lose its effect on cats.

3. Taboo. Catnip should not be used on pregnant cats as it can cause miscarriage. It cannot be used on young cats as it will irritate the respiratory system.