Very young and senior cats do not respond as much, or at all to Catnip. Also, 10-30% of the cat population does not respond to catnip at all, at any age. This is due to genetics - some cats are genetically "programmed" to respond to catnip, some aren't.
In any case, for all of the (sometimes entertaining) behaviors seen, catnip is completely nontoxic to cats. If a large quantity of fresh Catnip is consumed, you may see some vomiting or diarrhea, but this is rare and self-limiting. If your cat experiences this, limit or withhold catnip.
Additional Reading:
- Nepetalactone
- Chemical Structure and Information
From Anne Marie Helmenstine, Ph.D., Guide to Chemistry. - Catnip (Nepeta spp.)
Learn about various species of catnip, current research, how to grow it, and more...from Guide Juli Juli Kight, Herbs For Health. - Catnip and Cat Grasses
From Felidae World. - What
does the catnip plant look like?
From the Purdue Veterinary School plant database. - Catnip's
Effects on Humans
From 1001Herbs. Learn about the nutritional and digestive effects of catnip. - Will
catnip Work on Tigers?
Question of the Day, from HowThingsWork.com. - Gourmet Catnip
Products
From the Kooky Kat catnip Company.
- Operation
Catnip
While this isn't about catnip the mint, it is worthy of mention here because of the work that they do. Operation catnip is a nonprofit organization dedicated to humanely reducing the stray and feral cat population through a no-cost trap-neuter-return program. Check it out.

