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Most of us are aware of the allure catnip has over a lot of our feline friends. One whiff and it can turn even a lion, tiger or any other big cat into a drooling fluffball, let alone our domestic kitties back at home. But why do cats love catnip? What is it about this magical plant that affects them so much? Rory the Vet is here to explain the science behind this mysterious herb and its unique cat appeal.
MEET RORY THE VET
We’ve partnered up with animal whisperer and renowned veterinarian, Dr Rory Cowlam, to share his wisdom when it comes to all things furry. And boy, does this man know his stuff.
Starting with his degree from the Royal Veterinary College, Rory has since co-starred in the CBBC’s series The Pet Factor, shared his knowledge on the likes of Blue Peter and written all about it in his book, Secret Life of a Vet.
Starting with his degree from the Royal Veterinary College, Rory has since co-starred in the CBBC’s series The Pet Factor, shared his knowledge on the likes of Blue Peter and written all about it in his book, Secret Life of a Vet.
Follow him on Instagram
What Is Catnip?
Catnip comes from the plant Nepeta cataria, a herb from the mint family native to Europe and Asia. It has green foliage with lavender flowers. When smelled by a cat, this plant can affect their behaviour.
Besides being used in cat toys, catnip historically has been used in various ways for humans – including to make tea, to relieve coughs, or in some natural bug sprays.
How Does Catnip Work?
Catnip leaves, stems and pods contain an oil called nepetalactone – this substance is what causes cats to have these reactions.
When your cat smells catnip, the nepetalactone is released into your cat’s nose, and binds to the receptors in their nasal tissue, which triggers a response in their brain.
Why Do Cats Love Catnip?
So, why do cats like catnip so much? Catnip mimics feline pheromones, which can cause excitement and euphoria in some cats, similar to the behaviours a female cat will exhibit when in heat (note that male cats can also experience these effects from catnip).
How Do Cats React to Catnip?
Cats can react to catnip in various ways that can differ depending on the cat. Some of these behaviours include positive and mellow reactions, such as dozing, relaxing, rolling around and purring. Other reactions can be hyper playfulness and even aggression.
How Long Do the Effects of Catnip Last?
The duration of catnip’s effects varies from cat to cat – usually it’ll last for around 10 minutes before it begins to wear off. It may take 30 minutes before a cat can respond to catnip again after exposure.
Do All Cats Respond to Catnip?
Not all cats react to catnip! Around 60% of cats have a behavioural reaction, while others seem immune to the plant’s magic. This is because it is a genetically inherited trait. Kittens and senior cats are also not affected.
Is Catnip Bad for Cats?
Don’t worry cat parents – catnip is non-toxic and therefore safe for cats. It’s also not addictive. However, it’s important to limit how much you give yours, as too much can cause digestive upset. I would recommend discussing with your vet if you have any concerns.
How Should You Give a Cat Catnip?
There are different forms of catnip, from dried, fresh, sprays or toys that have it within. Ingestion of catnip can cause vomiting, so sprays and toys with catnip in it may be a better option for your cat.
If you are giving your cat fresh catnip, use 1 tablespoon – any more may be a touch too much.
Conclusion
Catnip can be a safe and fun way to enrich your little friend’s life as well as a great tool for pet parenting. For instance, it can be used to make playtime more exciting for an indoor cat, and it can be used to encourage cats to use a scratching post rather than your furniture, by simply sprinkling some catnip at its base. Go ahead and experiment with different forms of catnip, and share in the comments how your four-legged family member responds – I would love to hear!
The information in this article is intended as a guide to help pets and pet parents on their journey together. It is provided for educational and informational purposes only and is not meant as a substitute for professional advice from a vet, behaviourist, trainer or other professional. We encourage all pet parents to consult with their vet and/or behaviourist to ensure their pet’s specific needs are met.
Published on 26/02/2026
