Educational information, not medical advice — ask your doctor or midwife.
Catmint, also called catnip or catnep, is a leafy herb in the mint family. The dried leaves and flowers were brewed as a mild tea in European folk medicine. It was used mainly for restless sleep, fussy stomachs, and feverish colds.
The plant is the one that excites many cats. In people it has no such effect. Taken as a weak tea, it tastes bitter and faintly minty.
Here is the honest verdict. Human evidence for the tea is very thin, and no benefit is proven. Long use in folk medicine is not proof that it works, nor proof that it is safe.
The one strand with real research behind it is the oil, used on skin to keep mosquitoes away. That is a different product from the tea, and it is covered below.
No one has shown how catmint acts in the human body. What follows is proposed, not proven.
The herb contains an oil called nepetalactone. In laboratory tests and in animals, this oil appears to have a mild calming effect. Whether a cup of tea does anything similar in a person has not been tested well.
The oil has also been studied as an insect repellent. In lab and field tests, nepetalactone drives mosquitoes away from treated surfaces and skin. This is a repellent effect, not a medicine effect.
Catmint also holds rosmarinic acid and tannins. In test tubes these slow some bacteria and calm some markers of swelling. Those findings come from glassware, not from people, and should not be read as a treatment.
Folk writers said the warm tea made you sweat and brought a fever down. A hot drink of any kind can make you feel flushed and sweaty. That alone may explain much of the old reputation.
Catmint is sold in a few plain forms.
- Loose dried leaf and flower, for tea - Tea bags, often blended with other calming herbs - Liquid extracts and tinctures in alcohol or glycerine - Capsules of dried powdered leaf - Essential oil, for scent or as a skin repellent - Repellent sprays and lotions made from the oil - Fresh leaf, grown in gardens
The tea and the essential oil are not swaps for each other. Essential oils are far stronger than any tea. Do not swallow the essential oil.
Some people dry the herb and smoke it. This offers no proven benefit and irritates the airways.
Catmint was a common garden and hedgerow herb across Europe for centuries. It appears in English herbals from the 1500s onward under names such as catnep and nep.
Folk use centred on the warm tea. It was given for restless children, for wind and colic, and for the chills of a cold. Some village traditions used it for period pain and headaches.
It crossed to North America with settlers and spread as a roadside weed. There it kept much the same reputation as a quiet, everyday household tea.
The root was once said to make a mild person quarrelsome. That claim has no support and is best read as folklore. These are historical records of what people did, not advice to copy them.
Stop taking it and see a doctor if you get a rash, swelling of the face or lips, or trouble breathing.
See a doctor if a fever is high, or lasts more than three days. Get medical advice for stomach pain that is severe or will not settle.
See a doctor rather than treating yourself if sleep problems or anxiety are affecting your daily life. Call emergency services if a child swallows the essential oil.
In the United States catmint is sold as an ordinary herbal tea and dietary supplement. Repellent products made from its oil are registered with the Environmental Protection Agency.
In the UK and EU it is sold as a food or food supplement. It is not licensed as a medicine, so no health claims may be made for it.
Evidence grades and traditional-use labels are explained in our methodology. Nothing here is medical advice.
What it is typically used for, usual dose, cautions, and the study behind it where real trial data exists.
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