Sparteine is the alkaloid of broom (scopar-ins) and is used in the form of the sulphate.
It has no action on the skin and mucous membranes, but is rapidly absorbed from the latter. It slows the heart and soon weakens it, and has a slight stimulant action on the kidneys. In poisonous doses it paralyzes the nervous system, causing death by paralysis of the respiratory center.
It is excreted rapidly in the urine.