Catnip has no side effects for cats. Catnip is a natural non-toxic plant, and because it contains "nepetalactone", it stimulates the nerves and produces excitement when cats smoke and eat it, and it is not addictive. Cats will sneeze, roll, act coquettishly, and play wildly after smelling or eating catnip. It can promote the cat’s appetite and increase the cat’s amount of exercise.

Precautions for feeding catnip to cats:

1. Do not feed milk cats. Cats should be fed after they are 8 months old.

2. Pay attention to the appropriate amount of feeding and do not overfeed.

3. If there are multiple cats at home, it is best to isolate them when feeding to prevent them from getting excited and fighting after feeding.

4. Do not give catnip to pregnant cats to prevent the cat from being too excited and running and jumping, leading to miscarriage.