Myristica fragrans. The kernel of the ripe seed almost universally official; the oil in the U. S. and a few other countries; Nutmeg Butter (fixed oil of Nutmeg) in five countries; the seed arillus known as Mace in four countries, and the Oil of Mace in seven countries.

Nutmeg and mace are aromatic stimulants used in atonic states of the gastrointestinal tract. Nutmeg is given in doses of 2 to 10 grains; the oil is administered in an average dose of 3 minims. In large doses these agents are dangerous narcotics.