I was surprised when reading comments on the last post about catnip that some people did not know the effect it has on cats.
I found this piece on the internet that explains it fully.
A cat's behavior can change dramatically when they are introduced to catnip. ... Catnip also seems to make most cats more playful and more interested in toys. After a certain amount of time, cats under the influence of catnip seem to calm down and get sluggish and sleepy. Catnip has been found to be relatively harmless.
I do not give it to them often simply because of the effect but I took the box out of the drawer to put a bit in the crochet mouse and they were there like a shot, lol
Wish is worked on humans, we could both roll about having fun and then zonk out, lol