ABSTRACT

Toxic Principle and Mechanism of Action All species of the family Ericaceae contain varying quantities of toxic diterpenoids collectively known as grayanotoxins I and II (formerly andromedotoxin, rhodotoxin, and acetylandromedol).1 As many as 18 grayanotoxins (I – XVIII) have been identified, the greatest number being found in the Leucothoe species (fetter bush).2,3 Tannins and other compounds are also present in varying amounts. All parts of the laurel including the flowers are toxic, although there may be considerable variation between species.