A leaf tea was traditionally used for various ailments, and as an ancient medicine to induce menstruation or abortion, expectorant; insect repellant. Caution: essential oil of pennyroyal should never be taken internally as it is extremely toxic and can cause death.
References:
Grieve, M. (Maud). A Modern Herbal; the Medicinal, Culinary, Cosmetic and Economic Properties, Cultivation and Folk-Lore of Herbs, Grasses, Fungi, Shrubs, & Trees with All Their Modern Scientific Uses. New York :Harcourt, Brace & company, 1931.
Riddle, John (January 1994). Contraception and Abortion from the Ancient World to the Renaissance. Harvard University Press. ISBN 9780674168763
