Rhododendron/Grayanotoxin

The Rhododendron, a dangerous plant in all ways. In nature, it invades habitats, destroying colonies. In science, it contains a toxin called Grayanotoxin.

Intoxication in Humans
The voltage-gated sodium channels of the neurons are most likely a prominent target of grayanotoxins. In animal studies, Onat et al. found that injecting a small dose equivalent to 50 mg of honey intracerebroventricularly in anaesthetized albino rats caused marked bradycardia and respiratory depression. However, a much larger amount of extract, equivalent to 1 and 5 g/kg, was needed intraperitoneally to obtain the same results. This might indicate the important role of the central nervous system in grayanotoxin pathophysiology compared to the peripheral nervous system. Alternatively, intraperitoneal injection may result in increased elimination rates. 

I decided to use this plant in a liquid state, which will give the sensation of death to someone, but actually not killed them if given the right dose. For more information related to this toxin you can check the National Center of Biotechnology Information

http://www.countrysideinfo.co.uk/rhododen.htm