nitrospan: trade names for nitroglycerin used as a coronary vasodilator in the treatment of angina pectoris
vasodilator: a drug that causes dilation of blood vessels
plaster of paris: any of several gypsum cements; a white powder (a form of calcium sulphate) that forms a paste when mixed with water and hardens into a solid; used in making molds and sculptures and casts for broken limbs