Marjoram essential oil, Origanum majorana, possesses a warm, spicy aroma that blends nicely with citrus, rosewood, clary sage, lavender and other oils. It is considered a strong sedative. Marjoram essential oil is anti-spasmodic and can relieve muscle pain, cramps, headaches, migraines and stiffness. Do not use during pregnancy. Due to its sedating properties, avoid use while driving or drinking.