I've been away too long. I'm sure this site will be ok to post. I wrote to Mods but I figure I'll post it and if not ok I can then remove it.

http://www.aromaweb.com/essentialoilspz/peppermint.asp

[quote]Safety Information: Avoid in cardiac fibrillation, epilepsy, fever. Mucous membrane irritant and neurotoxic (toxic to the nerves). Some of this information applies to oral use, but is provided for informational purposes (no essential oil should be taken internally without the guidance of a qualified aromatherapy practitioner). [Robert Tisserand, Essential Oil Safety (United Kingdom: Churchill Livingstone, 1995), 160.]

May cause sensitization. [Julia Lawless, The Illustrated Encyclopedia of Essential Oils (Rockport, MA: Element Books, 1995), 175.][/endquote]