The Lady Thornburgh's Syrup of Elders

Take Elder-berries when they be red, bruise them in a stone Mortar, strain the juice, and boil it to a consumption of almost half, scum it very clear, take it off the fire whilest it is hot, put in sugar to the thickness of a syrup; put it no more on the fire, when it is cold, put it into Glasses, not filling them to the top, for it will work like Beer.

This cleanseth the stomach and spleen, and taketh away all obstructions of the Liver, by taking the quantity of a spoonful in a morning, and fasting a short time after it.

Source: A Queen's Delight: Or, The Art of Preserving, Conserving and Candying, Nathaniel Brooke