The root of Adonis vernalis contains a glucoside named adonidin. It is allied in action to digitoxin, one of the principles of digitalis, but is more irritating to the digestive organs.
Adonidin stimulates the heart and vaso-motor centers under some circumstances. It is not cumulative in tendency. It has no special power as a diuretic, though there may be some slight action resulting from the effect upon circulation in the kidneys.
In overdoses adonidin produces vomiting and diarrhoea.
Average dose, ʒ ii. - 8 mils.