Information on Pennyroyal

Latin NameMentha pulegium
Part UsedHerb
Herb FormsEssential oil, tincture, bulk herb.
AffectsBlood, Digestive system
CautionsThe essential oil and the tincture have been blamed for several deaths after being taken to attempt pre-term abortion. Never use the essential oil of pennyroyal internally. The herb tea is considered safe but is still not recommended during pregnancy.
Botanical InfoA low-growing, highly-branched annual with round to oval leaves and small pinkish-white flowers. A member of the mint family.
DescriptionPennyroyal leaves make a pleasant-tasting infusion beneficial for delayed menstruation, colds and fever, and flatulence and nausea. The oil is applied externally as an insect and flea repellant.

Pennyroyal has a taste of SPICY, AROMATIC and a temperature of COOL.


Infusion1 cup 2-3 x daily

Ailments Treated by Pennyroyal

AilmentTreatment SupportApplication
Fleasflea repellantoil externallly
Insect repellantinsect repellantuse diluted oil externally, commercial sprays available
Menstruation, suppressedblood-movertea only


Newall, C. et al.. 1996. Herbal Medicines: A Guide for Health-care Professionals. London: The Pharmaceutical Press.
McGuffin, M. et al. 1997. Botanical Safety Handbook. Boca Raton: CRC Press.
Felter, H.W. and J.U. Lloyd. 1983. (1898). King's Dispensatory. Portland, OR: Eclectic Medical Publications.
Weiss, R. 1988. Herbal Medicine. Beaconsfield, England: Beaconsfield Publishers.
Wren, R.C. 1988. Potter's New Cyclopaedia of Botanical Drugs. Essex: C.W. Daniel Co. Ltd.
Fernie, W. 1897. Herbal Simples. Bristol: John Wright & Co.
Sherman, J. 1979. The Complete Botanical Prescriber. Corvallis: Corvallis Naturopathic Clinic.