Pennyroyal (Mentha pulegium) is a plant that grows throughout the world. The leaves, and the oil they contain, are used to make medicine.
People use pennyroyal for the common cold, pneumonia, fatigue, ending a pregnancy (abortion), and as an insect repellant, but there is no good scientific evidence to support these uses. It is also unsafe, do proper research before ingesting.
Pennyroyal essential oil contains chemicals that have various toxic effects in the body. 
Side Effects
When taken by mouth: Pennyroyal essential oil is likely unsafe. It can cause serious liver and kidney damage, as well as nervous system damage. Repeated use may lead to death. There isn't enough reliable information to know if pennyroyal leaf is safe to use as a tea.
When applied to the skin: Pennyroyal essential oil is likely unsafe.
 Magickal: Peace, protection, strength (especially during travel). 1/2 oz bottle.