Catnip

Parts used and where grown

Catnip is a whitish-gray plant with a minty odor. The flowers are white with crimson dots. The catnip plant grows in North America and Europe. The leaves and flowers are used as medicine.

Catnip has been used in connection with the following conditions (refer to the individual health concern for complete information):

Rating	Health Concerns
	Cough Insomnia
Reliable and relatively consistent scientific data showing a substantial health benefit. Contradictory, insufficient, or preliminary studies suggesting a health benefit or minimal health benefit. For an herb, supported by traditional use but minimal or no scientific evidence. For a supplement, little scientific support and/or minimal health benefit.

Rating

Health Concerns

Cough

Insomnia

Reliable and relatively consistent scientific data showing a substantial health benefit.
2Stars

Contradictory, insufficient, or preliminary studies suggesting a health benefit or minimal health benefit.
1Star

For an herb, supported by traditional use but minimal or no scientific evidence. For a supplement, little scientific support and/or minimal health benefit.

Historical or traditional use (may or may not be supported by scientific studies)

Catnip is famous for inducing a delirious, stimulated state in felines. Throughout history, this herb has been used in humans to produce a sedative effect.¹ Several other conditions (including cancer, toothache, corns, and hives) have been treated with catnip by traditional herbalists.

Active constituents

The volatile oil in catnip contains the monoterpene, nepetalactone, which is similar to the valepotriates found in valerian, a more commonly used herbal sedative.² Human trials are lacking to prove the effectiveness of catnip for treating insomnia. It has been used traditionally to reduce gas and act as a digestive aid.³

How much is usually taken?

A catnip tea can be made by adding 1 cup (250 ml) of boiling water to 1–2 teaspoons (5–10 grams) of the herb; cover, then steep for ten to fifteen minutes. Drink 2–3 cups per day.⁴ For children with coughs, 1 teaspoon (5 ml) of tincture three times per day can be used. Adults may take twice this amount.

Are there any side effects or interactions?

No common side effects have been associated with the use of catnip. Since catnip (particularly the volatile oil) may act to promote uterine contractions, it should not be used during pregnancy.

At the time of writing, there were no well-known drug interactions with catnip.

References

1. Tyler VE. Herbs of Choice. Binghamton, NY: Pharmaceutical Products Press, 1994, 120–1.

2. Weiss RF. Herbal Medicine. Gothenburg, Sweden: Ab Arcanum, 1988, 282.

3. Sherry CJ, Hunter PS. The effect of an ethanol extract of catnip (Nepeta cataria) on the behavior of the young chick. Experientia 1979;35:237–8.

4. Gruenwald J, Brendler T, Jaenicke C, et al. (eds). PDR for Herbal Medicines. Montvale, NJ: Medical Economics, 1998, 991–2.

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The information presented in Healthnotes is for informational purposes only. It is based on scientific studies (human, animal, or in vitro), clinical experience, or traditional usage as cited in each article. The results reported may not necessarily occur in all individuals. For many of the conditions discussed, treatment with prescription or over-the-counter medication is also available. Consult your doctor, practitioner, and/or pharmacist for any health problem and before using any supplements or before making any changes in prescribed medications. Information expires March 2005.