History and Folklore

The botanical name of Pennyroyal comes from the Latin word for flea, alluding to its flea repellent properties.

Pennyroyal seems to have been a staple herb for the ancient physicians from ancient Greece to Northern Europe for a variety of complaints. It was even said that just hanging a branch in the sick room would aid in healing. Garlands of pennyroyal worn about the head was supposed to prevent headaches and giddiness and to help clear the mind. It was even believed to purify foul water.

Household Use

Pennyroyal has been used since Roman times to keep away fleas. The tincture can be sprayed into the pets bedding or added to wash water or a sachet can be placed in the dryer. Do not let your pet eat it however!

Infusing olive oil with Pennyroyal and other insect repelling herbs will create an herbal insect repellent to smooth onto your skin, as long as you’re not allergic or pregnant.

Medical Use

Pennyroyal tea is used for stomach complaints and to bring on delayed menstruation. It is still occasionally used in herbal combinations intended to end early pregnancies.

Pennyroyal may lower blood sugar levels; however, it should not be used for an extended period of time and is therefore not useful for this purpose for those who need to regulate their blood sugar levels. Also, if you are taking any medication to regulate your blood sugar levels, you should not use pennyroyal at all.


You should never ingest pennyroyal oil (or any other essential oil). Pennyroyal is generally used in tincture or tea form, that is, 1 teaspoon of dried leaves steeped in water and strained. Heavy concentrations of pennyroyal or prolonged use can cause severe damage to the liver and other organs and internal bleeding, convulsions, hallucinations and a number of other unpleasantries. Acetaminophen (Tylenol) can cause liver damage, and the addition of Pennyroyal into the mix can strengthen this possibility.

Some people have allergies to Pennyroyal. If you experience any irritation of the mucus membranes, itching, difficulty breathing, stomach cramps or vomiting, stop using Pennyroyal immediately and go to the emergency room if your symptoms are severe.

Use of Pennyroyal should always be carefully supervised because of the dangers associated with overdose. Pennyroyal should never be used for more than a week at a time. Pennyroyal should never be used in combination with other drugs or herbs that act on the liver.

Herbal abortion should never be attempted past the 8th week of pregnancy. Herbal abortion should never be attempted in any but the most normal of pregnancies. If any unusual cramping, especially in the side, should occur, discontinue use immediately and consult a medical doctor.

And though it may not need to be said after this discussion – Pennyroyal should not be used during pregnancy due to an increased risk of miscarriage.

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Loose in a 3 Gram bag.

Additional information

Weight 0.65 kg
Dimensions 6 × 6 × 2 in