anisethesia
An essential-oils-based "knock-out gas" made from aromatic herbal-extracts, and used to render patients unconscious prior to surgery.
I try to stay out of the hospital at all costs, anyway, but if I ever did need to undergo major surgery, I would rather get "put under" by a natural-plant anisethesia rather than any of those highly-dangerous synthetic-gas cocktails administered by mainstream medicine.