Pennyroyal linked to serious ailments

Pennyroyal, a creeping, aromatic member of the mint family, was esteemed by ancient Romans and early English royalty for its supposed curative powers. The plant’s dried leaves and stems have long been taken as a remedy for upset stomachs; its oil has a history as a treatment for skin irritations and as an insect repellent. The oil contains the highly toxic chemical pulegone, which may or may not be present in commercially available pennyroyal products.

Uses: Dried pennyroyal is still used to treat cramps, gas and indigestion, as well as colic in infants. Some homeopaths prescribe it for respiratory problems and colds. In some countries, the oil is an ingredient in herbal concoctions taken to induce abortions.

Dose: A few grams of the dried herb can be used to make an indigestion-soothing tea. Pennyroyal oil is also sold as a liquid extract. Doses vary.

Precautions: Many medical experts strongly discourage taking pennyroyal by mouth. Pulegone is toxic to the liver and may cause miscarriages. It may also damage the kidneys, lungs and nerves. Even small oral doses can increase blood pressure and cause nausea, stomach pain and fever. Topical pennyroyal can cause burning or an itchy rash.

Research: Pennyroyal contains tannins, which may help alleviate upset stomachs, but there is no proof of pennyroyal’s medicinal powers. Infants given pennyroyal tea have suffered liver and nervous system failure. In animal studies, pennyroyal oil has caused liver damage and death.

Dietary supplement makers are not required by the U.S. government to demonstrate that their products are safe or effective. Ask your healthcare provider for advice on selecting a brand.

*

-- Elena Conis