Imperialin (imperialine or peiminine) is an alkaloid found in the bulbs of species of the genus Fritillaria, where it occurs to the extent of 0.1 - 2.0%. In humans it may cause spasms, vomiting, hypotension and cardiac arrest. Management Inducing vomiting and administering activated charcoal. Spasmolytics may be required. References Quinolizidine alkaloids Plant toxins