pennyroyal(redirected from Penny royal)
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A name in alternative and complementary medicine given to Mentha pulegium (an aromatic pennyroyal), or to Hedeoma pulegeoides (American pennyroyal) (family Labiatae); an aromatic stimulant formerly used as an emmenagogue.
An aromatic herb that is used internally for anxiety, bloating, colds, coughs, indigestion, menstrual cramps and premenstrual syndrome.
Pennyroyal should not be used in pregnancy, as it stimulates uterine contraction; it should not be given to young children; it may cause liver damage.