Mantovani P, Santicioli P, Di Donato M
Boll Soc Ital Biol Sper. 1981 Jun 30;57(12):1346-51.
Ergometrine is able to increase the acid output from stomach-perfused rat preparation and its effect is antagonized by cimetidine. The drug excite the H1 receptors of guinea-pig's long strip. On the coronary artery isolated strip the alkaloid causes a potent vasoconstrictor effect mediator through receptors for biogenic amines.