# Plant Monograph: Catnip
**Name of plant:**
Catnip
**Catch phrase (Carmina Gadelica or traditional invocation if available):**
**“Sweet herb of the cat, calm the heart and quiet the troubled mind.”**
No specific Carmina Gadelica invocation for catnip has been identified. Catnip has a long European folk-medicine tradition and became naturalized throughout North America.
**Family:**
Lamiaceae
**Genus and species:**
*Nepeta cataria* L.
**Other names:**
* Catnip
* Catmint
* Catswort
* Catnep
* Catwort
* Field balm
* Nep
* *Nepeta cataria*
* Nepeta
**Brief introduction:**
Catnip is a perennial aromatic herb native to Europe, the Middle East and parts of Asia and now widely naturalized in North America. It has square stems, opposite grey-green leaves and small white flowers marked with purple or reddish spots.
Its distinctive volatile oil contains **nepetalactones**, compounds responsible for the characteristic response it produces in many cats. In human herbal tradition, however, catnip has principally been regarded as a gentle relaxing, digestive and diaphoretic herb.
European folk medicine traditionally used catnip tea for childhood restlessness, digestive discomfort, colic, colds and fevers. It was also employed as a mild calming herb for adults.
**Traditional uses:**
* Used as a calming tea for nervousness and restlessness.
* Traditionally given for infantile colic and digestive discomfort.
* Used as a diaphoretic during colds and fevers.
* Traditionally employed for stomach cramps, gas and indigestion.
* Used as a mild sedative and sleep-supporting herb.
**Historical use:**
* Catnip was used in European domestic medicine for centuries as a household tea.
* English herbal traditions employed catnip for digestive and nervous complaints.
* Catnip tea was historically used for children's colic and restlessness.
* European settlers introduced the plant into North America, where it became naturalized and entered local folk medicine.
* The herb was traditionally combined with other aromatic herbs in cold and fever preparations.
**Parts used and method of use:**
* Leaves.
* Flowering aerial parts.
Used as:
* Hot-water infusion (herbal tea).
* Decoction, although infusion is generally preferred for the aromatic herb.
* Tincture of the dried or fresh aerial parts.
* Fresh herb used traditionally in poultices or external preparations.
**Use in healing (modern herbal practice):**
* Traditionally used as a mild relaxing herb.
* Used in herbal practice for occasional digestive spasms and gas.
* Traditionally used as a gentle diaphoretic during uncomplicated colds.
* Used historically for tension-related headache and nervous restlessness.
* Sometimes included in traditional herbal preparations intended to support sleep.
Human clinical evidence is limited, and catnip should be regarded primarily as a **traditional mild herbal remedy rather than a clinically established sedative or antispasmodic**.
**Pharmacology and biochemistry:**
* **Nepetalactone** — the principal volatile constituent and the compound responsible for catnip's characteristic effects on cats.
* **Nepetalactone-related iridoids** — contribute to the plant's volatile oil chemistry.
* **Rosmarinic acid and other phenolic compounds** — contribute antioxidant activity.
Mechanisms:
* Nepetalactones interact strongly with feline olfactory pathways, producing the characteristic behavioural response in susceptible cats.
* In laboratory studies, catnip essential oil constituents demonstrate antimicrobial and insect-repellent activity.
* Phenolic constituents such as rosmarinic acid demonstrate antioxidant activity.
**Overall profile:**
Catnip is a **mild traditional calming and digestive herb** whose human medicinal reputation is considerably different from its famous effect on cats. Its chemistry is dominated by nepetalactones and other volatile compounds, with additional phenolic constituents. Traditional human uses are plausible but supported by relatively little modern clinical research.
**Common dosage:**
* **Infusion:** approximately 1–2 g dried aerial parts per cup of hot water, traditionally taken as a tea.
* **Dried herb:** approximately 2–5 g daily divided into traditional tea preparations.
* **Tincture:** approximately 2–4 mL of a standard tincture, up to several times daily depending on preparation strength.
* **External infusion:** cooled infusion applied as a wash or compress.
**Safety factors (including side effects):**
* Catnip is generally considered a relatively gentle herb when used in ordinary tea quantities.
* Large amounts may cause gastrointestinal upset, headache or excessive drowsiness.
* Avoid medicinal doses during pregnancy because historical reports have raised concern about possible uterine stimulation.
* Individuals allergic to plants in the mint family may experience allergic reactions.
* Long-term high-dose medicinal use has not been adequately studied.
**First aid / adverse reaction response:**
* **Mild nausea or stomach upset:** discontinue use and monitor symptoms.
* **Excessive drowsiness or dizziness:** stop use and avoid driving or operating machinery.
* **Skin irritation:** wash the affected area and discontinue external application.
* **Suspected excessive ingestion:** contact a poison-control centre or healthcare professional if significant symptoms develop.
* **Difficulty breathing, facial swelling or severe allergic reaction:** seek emergency medical attention immediately.
**Drug interactions:**
* May theoretically increase sedation when combined with sedative medicines or other strongly calming herbs.
* Additive effects are possible with alcohol and other central nervous system depressants.
* Because evidence is limited, caution is appropriate with medications affecting the central nervous system.
* No major clinically established drug interactions are well documented at ordinary dietary or tea quantities.
**Horticultural requirements:**
* **USDA / Canadian zone:** Approximately USDA zones 3–9; hardy through much of Canada.
* **Soil pH:** Approximately 6.0–7.5.
* **Light requirements:** Full sun to partial shade.
* **Moisture:** Moderate to low; prefers well-drained soil and tolerates drought once established.
**Other notes (growth habit, harvest timing, etc.):**
* **Growth habit:** Hardy perennial reaching approximately 45–100 cm, with branching square stems and aromatic grey-green foliage.
* **Flowering/fruiting:** Small white flowers with purple or reddish markings appear from early to midsummer and may continue into autumn.
* **Harvest timing:** Aerial parts are traditionally harvested when flowering, when aromatic constituents are well developed.
* **Habitat:** Roadsides, field margins, disturbed ground, gardens and dry open habitats.
* **Propagation/cultivation notes:** Easily grown from seed or division. Spreads readily and can become invasive in favourable conditions. Cats may damage young plants, so protective measures may be necessary.
**Sampling of clinical reports / studies:**
* **Clinical evidence:** Modern controlled clinical evidence for catnip in humans is sparse; its traditional uses are primarily supported by historical herbal practice rather than robust clinical trials.
* **Pharmacological study:** Catnip volatile oils demonstrate antimicrobial and insect-repellent activity in laboratory studies.
* **Phytochemical study:** *Nepeta cataria* contains nepetalactones, volatile terpenes, rosmarinic acid and other phenolic compounds.
* **Ethnobotanical evidence:** European and North American folk medicine extensively documents catnip tea for digestive complaints, colds, fever, restlessness and childhood colic.
* **Overall assessment of evidence:** **Well-established traditional use and substantial phytochemical knowledge, but limited human clinical evidence. Catnip is best regarded as a mild traditional digestive and calming herb rather than a proven pharmacological sedative.**
Educational Use Only: The information presented on this page is provided for educational, historical, and informational purposes only. ArdNemeton na Tuatha and Bhùth Draoi do not provide medical advice. Always consult your physician and pharmacist before using any herb, mushroom, supplement, or botanical product for medicinal purposes. Traditional uses described herein do not constitute medical claims.